Implement prototype: venue-driven simulation core, scenarios, tests, and playable entrance scene

- Godot 4.3 project scaffold with first-person guard, procedural world,
  interaction HUD, access inspection, radio forms, debug overlay, shift review
- Simulation core: ShiftCoordinator, VenueScenario, EventScheduler, NPCController/FSM,
  AccessVerifier, EscalationManager, RadioSystem, IncidentRecorder,
  ReputationEvaluator, CrowdSystem, EventBus
- Three authored scenarios (Hollywood Blvd building, The Joke Shop, TV studio)
- Custom headless test runner (25 tests) replacing editor-dependent GUT,
  plus GitHub Actions CI
- Documentation workflow live: README, PLAN (tech stack), TODO/DONE, MEMORY

src/test/check_loads.gd

@@ -0,0 +1,39 @@
+extends SceneTree
+## Dev diagnostic: preload every project script to surface parse errors one by one.
+
+const FILES := [
+	"res://src/core/event_bus.gd",
+	"res://src/core/rules.gd",
+	"res://src/core/access_artifact.gd",
+	"res://src/core/access_policy.gd",
+	"res://src/core/access_verifier.gd",
+	"res://src/core/npc_profile.gd",
+	"res://src/core/npc_controller.gd",
+	"res://src/core/fsm.gd",
+	"res://src/core/escalation_manager.gd",
+	"res://src/core/incident_recorder.gd",
+	"res://src/core/reputation_evaluator.gd",
+	"res://src/core/radio_system.gd",
+	"res://src/core/crowd_system.gd",
+	"res://src/core/event_scheduler.gd",
+	"res://src/core/venue_scenario.gd",
+	"res://src/core/shift_coordinator.gd",
+	"res://src/content/scenario_factory.gd",
+	"res://src/game/main.gd",
+	"res://src/test/test_utils.gd",
+]
+
+func _initialize() -> void:
+	var failures := 0
+	for f in FILES:
+		var res: Variant = load(f)
+		if res == null or not (res is GDScript):
+			push_error("FAILED to load: %s" % f)
+			failures += 1
+		elif not (res as GDScript).can_instantiate():
+			push_error("PARSE/COMPILE FAILURE (cannot instantiate): %s" % f)
+			failures += 1
+		else:
+			print("OK: %s" % f)
+	print("load failures: %d" % failures)
+	quit(1 if failures > 0 else 0)