Synchronise les parties entre les deux devices

ChessCubing.App/Models/MatchModels.cs

@@ -47,6 +47,9 @@ public sealed class MatchState
     [JsonPropertyName("schemaVersion")]
     public int SchemaVersion { get; set; } = 3;
 
+    [JsonPropertyName("collaborationSessionId")]
+    public string? CollaborationSessionId { get; set; }
+
     [JsonPropertyName("config")]
     public MatchConfig Config { get; set; } = new();