'az staticwebapp hostname show' does not show TXT validation token after 6 months

### Describe the bug

Hi team, we have a custom domain hosted in static sites, and we are using TXT validation to ensure Azure can create the certificate. This works fine on initial creation, but after 6 months, we run `az staticwebapp hostname show --subscription "XXX" --resource-group "XXX" --name "XXX" --hostname "XXX"` and we get

```
{
"createdOn": "2024-11-06T22:39:27.321505+00:00",
... (other properties)
"validationToken": null
}
```

Previously the validationToken was populated.

Given that the documentation for the `az staticwebapp hostname show` command says
```
show : Get details for a staticwebapp custom domain. Can be used to fetch validation token for
TXT domain validation (see example).
```
at the least, the documentation should be extended to cover the situation where the token doesn't exist any more, and what the user can do to fix it.

### Related command

az staticwebapp hostname show

### Errors

```
{
"createdOn": "2024-11-06T22:39:27.321505+00:00",
... (other properties)
"validationToken": null
}
```

### Issue script & Debug output

PS C:\Users\me> az staticwebapp hostname show --subscription "REDACTED" --resource-group "REDACTED" --name "REDACTED" --hostname "REDACTED.REDACTED" --query "validationToken" --debug

cli.knack.cli: Command arguments: ['staticwebapp', 'hostname', 'show', '--subscription', 'REDACTED', '--resource-group', 'REDACTED', '--name', 'REDACTED', '--hostname', 'REDACTED.REDACTED.qld.gov.au', '--query', 'validationToken', '--debug']
cli.knack.cli: __init__ debug log:
Enable colour in terminal.
Enable VT mode.
cli.knack.cli: Event: Cli.PreExecute []
cli.knack.cli: Event: CommandParser.OnGlobalArgumentsCreate [, , ]
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableCreate []
cli.azure.cli.core: Modules found from index for 'staticwebapp': ['azure.cli.command_modules.appservice']
cli.azure.cli.core: Loading command modules:
cli.azure.cli.core: Name Load Time Groups Commands
cli.azure.cli.core: appservice 0.800 80 277
cli.azure.cli.core: Total (1) 0.800 80 277
cli.azure.cli.core: These extensions are not installed and will be skipped: ['azext_ai_examples', 'azext_next']
cli.azure.cli.core: Loading extensions:
cli.azure.cli.core: Name Load Time Groups Commands Directory
cli.azure.cli.core: Total (0) 0.000 0 0
cli.azure.cli.core: Loaded 80 groups, 277 commands.
cli.azure.cli.core: Found a match in the command table.
cli.azure.cli.core: Raw command : staticwebapp hostname show
cli.azure.cli.core: Command table: staticwebapp hostname show
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableTruncate []
cli.azure.cli.core.azlogging: metadata file logging enabled - writing logs to 'REDACTED.log'.
az_command_data_logger: command args: staticwebapp hostname show --subscription {} --resource-group {} --name {} --hostname {} --query {} --debug
cli.knack.cli: Event: CommandInvoker.OnPreArgumentLoad [.add_subscription_parameter at REDACTED>]
cli.knack.cli: Event: CommandInvoker.OnPostArgumentLoad []
cli.knack.cli: Event: CommandInvoker.OnPostCommandTableCreate [.add_ids_arguments at REDACTED>, .add_cache_arguments at REDACTED>, .update_breaking_change_info at REDACTED>]
cli.knack.cli: Event: CommandInvoker.OnCommandTableLoaded []
cli.knack.cli: Event: CommandInvoker.OnPreParseArgs []
cli.knack.cli: Event: CommandInvoker.OnPostParseArgs [, , .parse_ids_arguments at REDACTED>]
cli.azure.cli.core.commands.client_factory: Getting management service client client_type=WebSiteManagementClient
cli.azure.cli.core.auth.persistence: build_persistence: location='REDACTED', encrypt=True
cli.azure.cli.core.auth.binary_cache: load: REDACTED
urllib3.util.retry: Converted retries value: 1 -> Retry(total=1, connect=None, read=None, redirect=None, status=None)
msal.authority: Initialising with Entra authority: REDACTED
msal.authority: openid_config(REDACTED) = REDACTED
msal.application: Broker enabled? True
cli.azure.cli.core.auth.credential_adaptor: CredentialAdaptor.get_token: scopes=('REDACTED',), kwargs={}
cli.azure.cli.core.auth.msal_credentials: UserCredential.get_token: scopes=('REDACTED',), claims=None, kwargs={}
msal.broker: [MSAL:0001] INFO LogTelemetryData:422 Printing Telemetry for Correlation ID: REDACTED
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: start_time, Value: REDACTED
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: api_name, Value: ReadAccountById
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: was_request_throttled, Value: false
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: authority_type, Value: Unknown
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: msal_version, Value: REDACTED
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: correlation_id, Value: REDACTED
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: broker_app_used, Value: false
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: stop_time, Value: REDACTED
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: msalruntime_version, Value: REDACTED
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: is_successful, Value: true
msal.broker: [MSAL:0001] INFO LogTelemetryData:430 Key: request_duration, Value: 0
msal.broker: [MSAL:0002] WARNING SetAuthorityUri:78 Initialising authority from URI 'REDACTED' without authority type, defaulting to MsSts
msal.broker: [MSAL:0002] INFO SetCorrelationId:258 Set correlation ID: REDACTED
msal.broker: [MSAL:0002] INFO EnqueueBackgroundRequest:1000 The original authority is 'REDACTED'
msal.broker: [MSAL:0002] INFO ModifyAndValidateAuthParameters:243 Authority Realm: REDACTED
msal.broker: [MSAL:0002] WARNING TryEnqueueMsaDeviceCredentialAcquisitionAndContinue:1052 MsaDeviceOperationProvider is not available. Not attempting to register the device.
msal.broker: [MSAL:0003] INFO StorageTokenResponse:84 StorageTokenResponse account constructor invoked. This is only expected in Runtime flows
msal.broker: [MSAL:0003] INFO IsAccessTokenValid:2658 The access token is expired
msal.broker: [MSAL:0003] WARNING StorageTokenResponse:15 No credentials found in the cache
msal.broker: [MSAL:0003] WARNING GetPlatformPropertiesFromStorage:2013 No account found in cache.
msal.broker: [MSAL:0003] INFO LogTelemetryData:422 Printing Telemetry for Correlation ID: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: start_time, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: api_name, Value: AcquireTokenSilently
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: was_request_throttled, Value: false
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: authority_type, Value: AAD
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: access_token_expiry_time, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: read_token, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: msal_version, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: client_id, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: correlation_id, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: storage_delete, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: broker_app_used, Value: true
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: stop_time, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: msalruntime_version, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: original_authority, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: request_eligible_for_broker, Value: true
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: additional_query_parameters_count, Value: 0
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: storage_read, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: delete_token, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: is_successful, Value: true
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: wam_telemetry, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: auth_flow, Value: Broker
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: tenant_id, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: write_token, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: storage_write, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: authorisation_type, Value: WindowsIntegratedAuth
msal.broker: [MSAL:0003] INFO LogTelemetryData:430 Key: request_duration, Value: REDACTED
msal.broker: [MSAL:0003] INFO LogTelemetryData:435 Printing Execution Flow: REDACTED
msal.token_cache: event={
"_account_id": "REDACTED",
"client_id": "REDACTED",
"data": {},
"environment": "REDACTED",
"grant_type": "broker",
"response": {
"_account_id": "REDACTED",
"_msalruntime_telemetry": {
"DATA LIMITED": "Full MSALRuntime telemetry not yet implemented",
"api_name": "AcquireTokenSilently",
"broker_app_used": "true",
"client_id": "REDACTED",
"correlation_id": "REDACTED",
"is_successful": "true",
"msal_version": "REDACTED",
"msalruntime_version": "REDACTED"
},
"access_token": "********",
"client_info": "REDACTED",
"expires_in": REDACTED,
"id_token": "********",
"id_token_claims": "********",
"scope": "REDACTED",
"token_type": "bearer"
},
"scope": [
"REDACTED",
"REDACTED"
],
"token_endpoint": "REDACTED"
}
cli.azure.cli.core.sdk.policies: Request URL: 'REDACTED'
cli.azure.cli.core.sdk.policies: Request method: 'GET'
cli.azure.cli.core.sdk.policies: Request headers:
cli.azure.cli.core.sdk.policies: 'Accept': 'application/json'
cli.azure.cli.core.sdk.policies: 'x-ms-client-request-id': 'REDACTED'
cli.azure.cli.core.sdk.policies: 'CommandName': 'staticwebapp hostname show'
cli.azure.cli.core.sdk.policies: 'ParameterSetName': '--subscription --resource-group --name --hostname --query --debug'
cli.azure.cli.core.sdk.policies: 'User-Agent': 'REDACTED'
cli.azure.cli.core.sdk.policies: 'Authorisation': '*****'
cli.azure.cli.core.sdk.policies: Request body:
cli.azure.cli.core.sdk.policies: This request has no body
urllib3.connectionpool: Starting new HTTPS connection (1): REDACTED
urllib3.connectionpool: REDACTED
cli.azure.cli.core.sdk.policies: Response status: 200
cli.azure.cli.core.sdk.policies: Response headers:
cli.azure.cli.core.sdk.policies: 'Cache-Control': 'no-cache'
cli.azure.cli.core.sdk.policies: 'Pragma': 'no-cache'
cli.azure.cli.core.sdk.policies: 'Content-Length': '672'
cli.azure.cli.core.sdk.policies: 'Content-Type': 'application/json'
cli.azure.cli.core.sdk.policies: 'Expires': '-1'
cli.azure.cli.core.sdk.policies: 'Strict-Transport-Security': 'max-age=31536000; includeSubDomains'
cli.azure.cli.core.sdk.policies: 'x-ms-request-id': 'REDACTED'
cli.azure.cli.core.sdk.policies: 'X-AspNet-Version': '4.0.30319'
cli.azure.cli.core.sdk.policies: 'X-Powered-By': 'ASP.NET'
cli.azure.cli.core.sdk.policies: 'x-ms-operation-identifier': 'REDACTED'
cli.azure.cli.core.sdk.policies: 'x-ms-ratelimit-remaining-subscription-reads': '249'
cli.azure.cli.core.sdk.policies: 'x-ms-ratelimit-remaining-subscription-global-reads': '3749'
cli.azure.cli.core.sdk.policies: 'x-ms-correlation-request-id': 'REDACTED'
cli.azure.cli.core.sdk.policies: 'x-ms-routing-request-id': 'REDACTED'
cli.azure.cli.core.sdk.policies: 'X-Content-Type-Options': 'nosniff'
cli.azure.cli.core.sdk.policies: 'X-Cache': 'CONFIG_NOCACHE'
cli.azure.cli.core.sdk.policies: 'X-MSEdge-Ref': 'REDACTED'
cli.azure.cli.core.sdk.policies: 'Date': 'REDACTED'
cli.azure.cli.core.sdk.policies: Response content:
cli.azure.cli.core.sdk.policies: {"id":"REDACTED","name":"REDACTED.REDACTED.qld.gov.au","type":"Microsoft.Web/staticSites/customDomains","location":"West US 2","properties":{"domainName":"REDACTED.REDACTED.qld.gov.au","isDefault":false,"createdOn":"REDACTED","expiresOn":"REDACTED","status":"Unhealthy","errorMessage":"An unknown error has occurred while attempting to renew your custom domain. Please ensure your domain is directing traffic to the static web app, and check again later."}}
cli.knack.cli: Event: CommandInvoker.OnTransformResult [, ]
cli.knack.cli: Event: CommandInvoker.OnFilterResult [.filter_output at REDACTED>]
cli.knack.cli: Event: Cli.SuccessfulExecute []
cli.knack.cli: Event: Cli.PostExecute []
az_command_data_logger: exit code: 0
cli.__main__: Command ran in REDACTED seconds (init: REDACTED, invoke: REDACTED)
telemetry.main: Begin splitting cli events and extra events, total events: 1
telemetry.client: Accumulated 0 events. Flush the clients.
telemetry.main: Finish splitting cli events and extra events, cli events: 1
telemetry.save: Save telemetry record of length REDACTED in cache file under REDACTED
telemetry.main: Begin creating telemetry upload process.
telemetry.process: Creating upload process: "REDACTED"
telemetry.process: Return from creating process REDACTED
telemetry.main: Finish creating telemetry upload process

### Expected behavior

Validation token is provided. Note that this token should not be treated as a secret - it's put into public DNS as a TXT record for the whole world to view on every domain.

### Environment Summary

PS C:\Users\me> az --version
azure-cli 2.70.0 *

core 2.70.0 *
telemetry 1.1.0

Extensions:
account 0.2.5
authV2 0.1.3
azure-devops 0.26.0
databricks 0.10.2
datafactory 1.0.2
resource-graph 2.1.0
storage-blob-preview 0.7.2
storage-preview 1.0.0b1

Dependencies:
msal 1.31.2b1
azure-mgmt-resource 23.1.1

Python location 'C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe'
Config directory 'C:\Users\me\.azure'
Extensions directory 'C:\Users\me\.azure\cliextensions'

Python (Windows) 3.12.8 (tags/v3.12.8:2dc476b, Dec 3 2024, 19:30:04) [MSC v.1942 64 bit (AMD64)]

Legal docs and information: aka.ms/AzureCliLegal

### Additional context

_No response_