Add troubleshooting / debug information

The issue names the broadcast, upload, and download stages, the Mail.app plugin, and OpenHaystack console output; start by tracing how these stages currently report status. Done would require agreed indicators for plugin connectivity, device registration, and actionable diagnostics, but no source file or test is identified in the issue.

Due to the fact that the process consists of several steps, it is hard to find out what is broken:
broadcast - upload - download.

Example:
Status "no reports found"
...flashed 2x ESP32 - They can be found as bluetooth device(BT scanner), but do not provide any log info on the serial connection.
...installed the Mail.app plugin, but since I have no working device it is hard to verify if the plugin is retrieving correct.

Is it possible to have an indicator "Mail.app plugin connection OK" ?
Is it possible to verify if a device is already known at Apple's Servers?

By now it is only possible to verify the console: (filtered by Process== OpenHaystack)
Where that NSURLErrorDomain error can be found, but how to find out if that "Berlin" is OK - or should be "Vienna" in my case?

	standard	11:46:28.930936+0100	Requesting data for (
    "5le8H/6goDaqDDW9lAEmh1xw3LfO7wprwQ1lVf5PtAY="
)	OpenHaystack
	standard	11:46:28.931047+0100	Query : {
    search =     (
                {
            endDate = 1615459588930;
            ids =             (
                "5le8H/6goDaqDDW9lAEmh1xw3LfO7wprwQ1lVf5PtAY="
            );
            startDate = 1613645188930;
        }
    );
}	OpenHaystack
com.apple.securityd	standard	11:46:28.932385+0100	UNIX error exception: 17	OpenHaystack
com.apple.securityd	standard	11:46:28.935303+0100	UNIX error exception: 17	OpenHaystack
	standard	11:46:28.985368+0100	Headers:
{
    Accept = "application/json";
    Authorization = "Basic MTE0OTgzODE1OTk6RUFBSkFBQUFCTHdJQUFBQUFHQkk4bmtSRG1kekxtbGpiRzkxWkM1aGRYUm92UURiWmoxcG1pbGY5cFBXMlhUMW9kQ0dER3BhYm1hUnlwOGk5WlN4NDJNY0xBLWp1aVdlSTVEU0FENkNSNm4zcW1UWlZRVGdTYmdsbU1lTXNfc25XN2VqOUcxWEJyallDT2NIUDljNVpWcGR5UEF4NXZpQ3ZYZkpNZ1BjamxCZTVxWWozMEE1UU9JNWwxR09ZTFcyV1cwX2p0UTBPZ35+";
    "Content-Type" = "application/json";
    "X-Apple-I-Client-Time" = "2021-03-11T10:46:28Z";
    "X-Apple-I-MD" = "AAAABQAAABBjePJUpnnQ/EgLRmJlq8T2AAAAAQ==";
    "X-Apple-I-MD-M" = "dniIKdtJ9l01TbcG7rpxDfz18zdt4f9jop9faphccmhdPt819agG0tCFOTbBE/xaC3G1j4UcW3Uxq31F";
    "X-Apple-I-MD-RINFO" = 17106176;
    "X-Apple-I-TimeZone" = CET;
}	OpenHaystack
com.apple.CFNetwork	standard	11:46:28.985872+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> {strength 1, tls 8, ct 0, sub 0, sig 0, ciphers 1, bundle 0, builtin 0}	OpenHaystack
	standard	11:46:28.986140+0100	Connection 17: enabling TLS	OpenHaystack
	standard	11:46:28.986160+0100	Connection 17: starting, TC(0x0)	OpenHaystack
com.apple.network	standard	11:46:28.986182+0100	[C17 F98C71D1-7DDC-4D5B-BCE2-505AC577778F gateway.icloud.com:443 tcp, url hash: 440ac18c, tls, context: com.apple.CFNetwork.NSURLSession.{2ED42E76-C3B9-4DE3-BC3C-774E8312E85A}{(null)}{Y}{2}, proc: 8EFF089C-D52A-3950-B598-8A3ADB7EF06C] start	OpenHaystack
com.apple.network	standard	11:46:28.986219+0100	[C17 gateway.icloud.com:443 initial path ((null))] event: path:start @0.000s	OpenHaystack
com.apple.network	standard	11:46:28.986366+0100	[C17 gateway.icloud.com:443 waiting path (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: path:satisfied @0.000s, uuid: AB6E1AAC-DCAE-4ABC-8212-6A885760EBCD	OpenHaystack
com.apple.network	standard	11:46:28.986435+0100	[C17 gateway.icloud.com:443 in_progress resolver (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: resolver:start_dns @0.000s	OpenHaystack
com.apple.network	standard	11:46:28.986450+0100	nw_connection_report_state_with_handler_on_nw_queue [C17] reporting state preparing	OpenHaystack
	standard	11:46:28.986531+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> setting up Connection 17	OpenHaystack
com.apple.network	standard	11:46:29.042970+0100	[C17 gateway.icloud.com:443 in_progress resolver (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: resolver:receive_dns @0.056s	OpenHaystack
com.apple.network	standard	11:46:29.043111+0100	[C17.1 17.248.147.141:443 initial path ((null))] event: path:start @0.056s	OpenHaystack
com.apple.network	standard	11:46:29.043390+0100	[C17.1 17.248.147.141:443 waiting path (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: path:satisfied @0.057s, uuid: 9690C1B3-9DAC-4E33-A53C-24822AE7E97D	OpenHaystack
com.apple.network	standard	11:46:29.043842+0100	[C17.1 17.248.147.141:443 in_progress socket-flow (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: flow:start_connect @0.057s	OpenHaystack
com.apple.network	standard	11:46:29.089670+0100	[C17 gateway.icloud.com:443 in_progress resolver (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: resolver:receive_dns @0.103s	OpenHaystack
com.apple.network	standard	11:46:29.100735+0100	[C17 gateway.icloud.com:443 in_progress resolver (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: resolver:receive_dns @0.114s	OpenHaystack
com.apple.network	standard	11:46:29.100771+0100	nw_socket_handle_socket_event [C17.1:3] Socket received CONNECTED event	OpenHaystack
com.apple.network	standard	11:46:29.100841+0100	nw_flow_connected [C17.1 17.248.147.141:443 in_progress socket-flow (satisfied (Path is satisfied), viable, interface: en7, ipv4, dns)] Transport protocol connected	OpenHaystack
com.apple.network	standard	11:46:29.100903+0100	[C17.1 17.248.147.141:443 in_progress socket-flow (satisfied (Path is satisfied), viable, interface: en7, ipv4, dns)] event: flow:finish_transport @0.114s	OpenHaystack
com.apple.network	standard	11:46:29.100954+0100	[C17 gateway.icloud.com:443 in_progress resolver (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: flow:finish_transport @0.114s	OpenHaystack
com.apple.network	standard	11:46:29.101550+0100	boringssl_session_apply_protocol_options_for_transport_block_invoke(1689) [C17.1:2][0x7fd9f37939d0] TLS configured [min_version(0x0303) max_version(0x0304) name(<private>) tickets(false) false_start(false) enforce_ev(false) enforce_ats(false)]	OpenHaystack
com.apple.network	standard	11:46:29.101675+0100	boringssl_context_info_handler(1821) [C17.1:2][0x7fd9f37939d0] Client handshake started	OpenHaystack
com.apple.network	standard	11:46:29.101785+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS client enter_early_data	OpenHaystack
com.apple.network	standard	11:46:29.101953+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS client read_server_hello	OpenHaystack
com.apple.network	standard	11:46:29.146291+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client read_hello_retry_request	OpenHaystack
com.apple.network	standard	11:46:29.146353+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client read_server_hello	OpenHaystack
com.apple.network	standard	11:46:29.146619+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client read_encrypted_extensions	OpenHaystack
com.apple.network	standard	11:46:29.146914+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client read_certificate_request	OpenHaystack
com.apple.network	standard	11:46:29.158684+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client read_server_certificate	OpenHaystack
com.apple.network	standard	11:46:29.158844+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client read_server_certificate_verify	OpenHaystack
com.apple.network	standard	11:46:29.159559+0100	boringssl_context_evaluate_trust_async(1510) [C17.1:2][0x7fd9f37939d0] Performing external trust evaluation	OpenHaystack
com.apple.network	standard	11:46:29.159710+0100	boringssl_context_evaluate_trust_async_external(1495) [C17.1:2][0x7fd9f37939d0] Asyncing for external verify block	OpenHaystack
	standard	11:46:29.159877+0100	Connection 17: asked to evaluate TLS Trust	OpenHaystack
	standard	11:46:29.166486+0100	System Trust Evaluation yielded status(0)	OpenHaystack
	standard	11:46:29.172389+0100	Connection 17: TLS Trust result 0	OpenHaystack
com.apple.network	standard	11:46:29.172410+0100	boringssl_context_evaluate_trust_async_external_block_invoke_3(1451) [C17.1:2][0x7fd9f37939d0] Returning from external verify block with result: true	OpenHaystack
com.apple.network	standard	11:46:29.172451+0100	boringssl_context_certificate_verify_callback(1609) [C17.1:2][0x7fd9f37939d0] Certificate verification result: OK	OpenHaystack
com.apple.network	standard	11:46:29.172741+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client read_server_finished	OpenHaystack
com.apple.network	standard	11:46:29.172878+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client send_end_of_early_data	OpenHaystack
com.apple.network	standard	11:46:29.172897+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client send_client_certificate	OpenHaystack
com.apple.network	standard	11:46:29.172911+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client complete_second_flight	OpenHaystack
com.apple.network	standard	11:46:29.172974+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS 1.3 client done	OpenHaystack
com.apple.network	standard	11:46:29.173074+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS client finish_client_handshake	OpenHaystack
com.apple.network	standard	11:46:29.173096+0100	boringssl_context_info_handler(1836) [C17.1:2][0x7fd9f37939d0] Client handshake state: TLS client done	OpenHaystack
com.apple.network	standard	11:46:29.173177+0100	boringssl_context_info_handler(1826) [C17.1:2][0x7fd9f37939d0] Client handshake done	OpenHaystack
com.apple.network	standard	11:46:29.173537+0100	nw_protocol_boringssl_signal_connected(734) [C17.1:2][0x7fd9f37939d0] TLS connected [version(0x0304) ciphersuite(TLS_AES_128_GCM_SHA256) group(0x001d) signature_alg(0x0403) alpn(http/1.1) resumed(0) offered_ticket(0) false_started(0) ocsp_received(1) sct_received(0) connect_time(72ms) flight_time(45ms) rtt(22ms) write_stalls(0) read_stalls(3)]	OpenHaystack
com.apple.network	standard	11:46:29.173656+0100	nw_flow_connected [C17.1 17.248.147.141:443 in_progress socket-flow (satisfied (Path is satisfied), viable, interface: en7, ipv4, dns)] Output protocol connected	OpenHaystack
com.apple.network	standard	11:46:29.173837+0100	[C17.1 17.248.147.141:443 ready socket-flow (satisfied (Path is satisfied), viable, interface: en7, ipv4, dns)] event: flow:finish_connect @0.187s	OpenHaystack
com.apple.network	standard	11:46:29.174016+0100	nw_connection_report_state_with_handler_on_nw_queue [C17] reporting state ready	OpenHaystack
com.apple.network	standard	11:46:29.174082+0100	[C17 gateway.icloud.com:443 ready resolver (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: flow:finish_connect @0.187s	OpenHaystack
com.apple.network	standard	11:46:29.174154+0100	[C17.1 17.248.147.141:443 ready socket-flow (satisfied (Path is satisfied), viable, interface: en7, ipv4, dns)] event: flow:changed_viability @0.187s	OpenHaystack
com.apple.network	standard	11:46:29.174181+0100	[C17 gateway.icloud.com:443 ready resolver (satisfied (Path is satisfied), interface: en7, ipv4, dns)] event: flow:changed_viability @0.187s	OpenHaystack
	standard	11:46:29.174249+0100	Connection 17: connected successfully	OpenHaystack
	standard	11:46:29.174278+0100	Connection 17: TLS handshake complete	OpenHaystack
	standard	11:46:29.174453+0100	Connection 17: ready C(N) E(N)	OpenHaystack
	standard	11:46:29.174613+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> now using Connection 17	OpenHaystack
	standard	11:46:29.174752+0100	Connection 17: received viability advisory(Y)	OpenHaystack
	standard	11:46:29.174999+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> sent request, body D 124	OpenHaystack
	standard	11:46:29.401104+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> received response, status 401 content K	OpenHaystack
	standard	11:46:29.401552+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> done using Connection 17	OpenHaystack
com.apple.CFNetwork	standard	11:46:29.401690+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> summary for auth challenge {transaction_duration_ms=416, response_status=401, connection=17, protocol="http/1.1", domain_lookup_duration_ms=56, connect_duration_ms=130, secure_connection_duration_ms=72, request_start_ms=189, request_duration_ms=0, response_start_ms=415, response_duration_ms=0, request_bytes=973, response_bytes=859, cache_hit=0}	OpenHaystack
	standard	11:46:29.401833+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> now using Connection 17	OpenHaystack
	standard	11:46:29.402108+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> sent request, body D 124	OpenHaystack
	standard	11:46:29.644777+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> received response, status 401 content K	OpenHaystack
	standard	11:46:29.644907+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> response ended	OpenHaystack
	standard	11:46:29.644961+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> done using Connection 17	OpenHaystack
com.apple.CFNetwork	standard	11:46:29.645076+0100	Task <B615A893-BC2C-4DBD-81DC-FE540D1C909D>.<0> summary for task success {transaction_duration_ms=243, response_status=401, connection=17, reused=1, request_start_ms=0, request_duration_ms=0, response_start_ms=242, response_duration_ms=0, request_bytes=973, response_bytes=859, cache_hit=0}	OpenHaystack
	standard	11:46:29.645342+0100	Error during request: 

Error Domain=NSURLErrorDomain Code=-1012 "(null)" UserInfo={NSErrorFailingURLStringKey=https://gateway.icloud.com/acsnservice/fetch, NSUnderlyingError=0x6000033225b0 {Error Domain=kCFErrorDomainCFNetwork Code=-1012 "(null)" UserInfo={_kCFURLErrorAuthFailedResponseKey=<NSHTTPURLResponse: 0x600003c99c40> { URL: https://gateway.icloud.com/acsnservice/fetch } { Status Code: 401, Headers {
    "Apple-Originating-System" =     (
        UnknownOriginatingSystem
    );
    Connection =     (
        "keep-alive"
    );
    "Content-Length" =     (
        0
    );
    Date =     (
        "Thu, 11 Mar 2021 10:46:29 GMT"
    );
    Server =     (
        "AppleHttpServer/4b0f4e40276cabbbae998f715d1fd1336e7478a2"
    );
    "Strict-Transport-Security" =     (
        "max-age=31536000; includeSubDomains;"
    );
    Via =     (
        "xrail:st53p00ic-qujn12070302.me.com:8301:20D277:grp60,631194250daa17e24277dea86cf30319:d7eedfa27549881027b210646fdd275e:Berlin"
    );
    "Www-Authenticate" =     (
        "	OpenHaystack