Hydrogen makes invalid query for device keys when using guest user

Describe the bug

When you enter a world as a guest user, there's a request to the https://matrix.thirdroom.io/_matrix/client/r0/keys/query? which returns a 404. The stack trace below shows this stemming from PeerCall.handleNegotiation.

POST https://matrix.thirdroom.io/_matrix/client/r0/keys/query? 404
fetchRequest	@	hydrogen.es.js:1107
_baseRequest	@	hydrogen.es.js:9093
_authedRequest	@	hydrogen.es.js:9116
_post	@	hydrogen.es.js:9119
queryKeys	@	hydrogen.es.js:9206
_doSend	@	hydrogen.es.js:9946
_hsApiRequest	@	hydrogen.es.js:9937
HomeServerApiWrapper.<computed>	@	hydrogen.es.js:9910
deviceForId	@	hydrogen.es.js:18959
await in deviceForId (async)		
(anonymous)	@	hydrogen.es.js:20921
run	@	hydrogen.es.js:182
wrap	@	hydrogen.es.js:94
encryptDeviceMessage	@	hydrogen.es.js:20920
encryptDeviceMessage	@	hydrogen.es.js:20329
Member.sendSignallingMessage	@	hydrogen.es.js:20102
(anonymous)	@	hydrogen.es.js:19994
run	@	hydrogen.es.js:182
wrap	@	hydrogen.es.js:94
sendSignallingMessage	@	hydrogen.es.js:19993
handleNegotiation	@	hydrogen.es.js:19490
await in handleNegotiation (async)	

To Reproduce
Steps to reproduce the behavior:

1. Use a guest account
2. Enter a world
3. See the console for the error

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: macOS
• Browser: Chrome
• Version: 105

Reproduce the guest-user flow by entering a world and inspect the request from PeerCall.handleNegotiation in hydrogen.es.js, especially the queryKeys call and its 404 response. Trace how the guest device key request is formed, then verify that entering a world no longer sends the invalid request or produces the reported error.