Harden AI Docker runtime imports

backend/app/services/yolo_adapter.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import importlib.util
 from pathlib import Path
 from typing import Any
 
@@ -14,7 +13,12 @@ class YoloDetectionAdapter:
 
     @staticmethod
     def dependencies_available() -> bool:
-        return importlib.util.find_spec("ultralytics") is not None and importlib.util.find_spec("torch") is not None
+        try:
+            import torch  # noqa: F401
+            import ultralytics  # noqa: F401
+        except Exception:
+            return False
+        return True
 
     def load_model(self, model_path: Path):
         if not model_path.exists() or not model_path.is_file():