Some orgnization, and cleanup to come.

RelayServer/Models/Rtc/RtcIceCandidate.cs

@@ -0,0 +1,14 @@
+using SurrealDb.Net.Models;
+
+namespace RelayServer.Models.Rtc;
+
+public class RtcIceCandidate : Record
+{
+    public required string ChannelId { get; set; }
+    public required string Username { get; set; }
+    public required string Candidate { get; set; }
+    public string? SdpMid { get; set; }
+    public int? SdpMLineIndex { get; set; }
+    public required string Direction { get; set; } // "offer" or "answer"
+    public DateTime CreatedAt { get; set; }
+}