Debug: print registered FastAPI routes at startup

backend/app/main.py

@@ -215,6 +215,17 @@ async def startup_event():
 
     # Launch universal warmup in background
     asyncio.create_task(run_universal_warmup())
+    # DEBUG: print all registered routes for troubleshooting
+    try:
+        robust_print("[ROUTES] Registered FastAPI routes:")
+        for r in app.routes:
+            try:
+                methods = ",".join(sorted(list(r.methods))) if hasattr(r, 'methods') and r.methods else ''
+            except Exception:
+                methods = ''
+            robust_print(f"[ROUTE] path={getattr(r, 'path', str(r))} name={getattr(r, 'name', '')} methods={methods}")
+    except Exception:
+        pass
     robust_print("-" * 50, flush=True)
     robust_print("FakeShield API is now ONLINE and listening on port 8001.", flush=True)
     robust_print("-" * 50, flush=True)