fix(jitsi): allow non-moderators to request Jitsi tokens

Removed the 403 guard that blocked non-moderators. is_moderator is
already passed through to the token payload, so participants get
"moderator": false as expected.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/routers/api.py

@@ -187,8 +187,6 @@ class JitsiTokenRequest(BaseModel):
 @router.post("/jitsi_token")
 async def create_jitsi_jwt(request_data: JitsiTokenRequest = Body(...)):
     log.setLevel(logging.INFO)
-    if not request_data.is_moderator:
-        raise HTTPException(status_code=403, detail="JWT generation is only permitted for moderators.")
 
     try:
         payload = {