more TODOs

RelayServer/Endpoints/RtcEndpoints.cs

@@ -13,6 +13,7 @@ public static class RtcEndpoints
     public static void MapRtcEndpoints(this WebApplication app)
     {
         // Join a channel call and determine whether the caller should become the offerer.
+        //TODO: Remove join endpoint and redo its logic in correct locations
         app.MapPost("/api/rtc/join", async (RtcJoinRequest request, RtcCallService rtcCallService) =>
         {
             return Results.Ok(await rtcCallService.JoinCallAsync(request.ChannelId, request.Username));