Handler for POST /livekit/token endpoint

Generates a LiveKit JWT token for a participant to join a specific room.

When authentication is enabled (auth.id is present), this handler:

1. Creates the room if it doesn't exist
2. Sets room.metadata.auth_id to the authenticated tenant's ID
3. Issues the token only after metadata is verified/set

Arguments

• state - Shared application state containing LiveKit configuration
• request - Token request with room name and participant details

Returns

• Response - JSON response with token or error status

Errors

• 400 Bad Request - Invalid request data (empty fields)
• 403 Forbidden - Room exists with a different tenant's auth_id
• 500 Internal Server Error - LiveKit service not configured, room creation failed, or token generation failed

{
  "room_name": "conversation-room-123",
  "participant_name": "Alice Smith",
  "participant_identity": "user-alice-456"
}

{
  "participant_identity": "user-alice-456",
  "participant_name": "Alice Smith",
  "room_name": "conversation-room-123"
}

{
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "room_name": "conversation-room-123",
  "participant_identity": "user-alice-456",
  "livekit_url": "ws://localhost:7880"
}

{
  "livekit_url": "ws://localhost:7880",
  "participant_identity": "user-alice-456",
  "room_name": "conversation-room-123",
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}