MSCO 2.10.1: car doors and garage door synced, door lock fix, perf tools

- Car doors (FSM with bool "Open" and "Open door"/"Close door") are synced as open/closed:
  the receiver removes the hold joint and frees the hinge, closing runs the game's own logic
- Fix: every synced close of an already closed Satsuma door added another FixedJoint, so the
  door could not be opened anymore; extra joints are removed automatically
- Hinge sync also covers world doors/gates with hinges (garage door), interaction by bounds
- Scene name read once per frame (Application.loadedLevelName allocates a string per call)
- Console "perf" (FPS, ms per MSCO part incl. OnGUI, GC, hook calls), -msco-perf start option
- Console "fsmdump <text>" / -msco-dump: PlayMaker FSMs and hinges to MSCO\fsmdump.txt

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

MultiplayerManager.cs

@@ -339,6 +339,7 @@ namespace MSCO
         void MeasureFps()
         {
             float dt = Time.unscaledDeltaTime;
+            PerfStats.Frame(dt);
             fpsFrames++;
             fpsTimer += dt;
             frameMsWorstWindow = Mathf.Max(frameMsWorstWindow, dt * 1000f);
@@ -1992,6 +1993,7 @@ namespace MSCO
 
         void OnLevelWasLoaded(int level)
         {
+            MenuHelper.SceneChanged();
             menuButtonsHidden = false; // neues Hauptmenü: Knöpfe wieder ausblenden
             nextPresenceUpdate = 0f; // Discord gleich nach dem Szenenwechsel aktualisieren
             if (MenuHelper.InGame)
@@ -2252,6 +2254,7 @@ namespace MSCO
         {
             double ms = (partWatch.ElapsedTicks - partStart) * 1000.0 / System.Diagnostics.Stopwatch.Frequency;
             frameMsco += ms;
+            PerfStats.Add(name, ms);
             if (ms > slowestMs) { slowestMs = ms; slowestPart = name; }
         }
 
@@ -2594,6 +2597,13 @@ namespace MSCO
         // ---------------------------------------------------------------- GUI
 
         void OnGUI()
+        {
+            PartStart();
+            try { DrawGui(); }
+            finally { PartEnd("interface (OnGUI)"); }
+        }
+
+        void DrawGui()
         {
             InputLock.KeepCursorFree();
             if (MenuHelper.InMenu)