fix(orchestrator): Apply refinements from code review

backend/src/ea_chatbot/utils/vfs.py

@@ -17,8 +17,11 @@ class VFSHelper:
     def read(self, filename: str) -> Tuple[Optional[Any], Optional[Dict[str, Any]]]:
         """Read a file and its metadata from the VFS. Returns (None, None) if not found."""
         file_data = self._vfs.get(filename)
-        if file_data:
-            return file_data["content"], file_data["metadata"]
+        if file_data is not None:
+            # Handle raw values (backwards compatibility or inconsistent schema)
+            if not isinstance(file_data, dict) or "content" not in file_data:
+                return file_data, {}
+            return file_data["content"], file_data.get("metadata", {})
         return None, None
         
     def list(self) -> List[str]: