Partytracks/sessions/new 403 Forbidden Error

When build from localhost & try to join room, got error message, it keeps report error on the URL:

```
[wrangler:inf] POST /partytracks/sessions/new 403 Forbidden (476ms)
{
eventName: 'alarm',
meetingId: '4db66d72-83bd-4111-994b-c5b349a42f57'
}
{
eventName: 'clientNegotiationRecord',
connectionId: '95f0c480-3961-4a90-8c7d-43e3f2544afd',
meetingId: '4db66d72-83bd-4111-994b-c5b349a42f57',
entry: {
endpoint: '/partytracks/sessions/new?correlationId=4db66d72-83bd-4111-994b-c5b349a42f57',
method: 'POST',
type: 'request'
},
sessionId: undefined
}
```


Start by reproducing the localhost room-join flow and inspect the Wrangler log for POST /partytracks/sessions/new returning 403. Trace the request associated with the meetingId and correlationId shown in the report to identify where the rejection occurs. Done means joining a room from localhost no longer produces the 403 response.

Written by the indexing model from the issue text.