Add subroutine-execution diagnostics + Godot --scene

- CLI run: report call-script dispatch count + distinct source scripts per run.
- Godot --scene <NAME>: play any scene (not just SC0000).
- Godot reports the call-scripts executed as nested frames at scene end (collected
  thread-safely; Godot drops GD.Print from the VM background thread).

Demonstrated live: SC0240 in Godot executes 29 call-scripts (RESETLAND, SETEN,
ADDEN, RENDERMAP, SETOBJ, DRAWOBJ, CALCREVISE, LOOK) as nested subroutine frames.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

godot/GodotAdvHost.cs

@@ -42,7 +42,10 @@ public sealed class GodotAdvHost : IHost
     // called from the main thread (click) or the selftest auto-clicker
     public void SignalInput() { if (_gate.CurrentCount == 0) _gate.Release(); }
 
-    public void CallScript(long id) { }
+    // Records each call-script the VM dispatches (runs on the VM thread, so collect thread-safely and
+    // let the main thread report it — Godot drops GD.Print from background threads).
+    public readonly System.Collections.Concurrent.ConcurrentQueue<long> Dispatched = new();
+    public void CallScript(long id) => Dispatched.Enqueue(id);
     public void OnStub(int opcode) { }
 
     // ---- texture ops (run on the VM thread; marshal Godot node work to the main thread) ----