feat: sync upstream commits up to f17c92bc

fix(critical): replace super().__setattr__ with object.__setattr__ in ExecutionFailure to fix Python 3.12 slots+exception MRO crash causing 500 errors

feat: synchronize proxy with upstream commits up to 5305bd7 and integrate NIM key rotator

fix: replace super() with explicit calls to prevent async Python 3.12+ bug and suppress HEAD / logs

Deploy latest upstream with key rotation, vision adapter, and HF configs

fix: next_client typo and dataclass super() issue in ExecutionFailure

Deploy to Hugging Face Space