[CRITICAL] NameError in vector store except block

Inside an except block, print(f"... {e}") references e, but e is bound in a different outer except clause. In Python, the exception variable is deleted after its except block exits. When inner except is hit, e is not in scope and raises NameError.\n\nFile: Backend/agent/vector_store.py, line ~73\nFix: Give inner except clause its own variable: except Exception as inner_e: