• Previously save/delete failures were only logged, so callers believed commits succeeded when storage ops had already failed.
• Sync commit: processes saves sequentially, then deletes. Logs failures with tracebacks and re-raises. Ignores FileNotFoundError on delete. Stops on first save error. Clears internal state only on full success.
• Async commit: runs saves and deletes concurrently via asyncio.gather. Logs each failure with exc_info. Raises the first real Exception, and lets BaseException (e.g., CancelledError) bubble. Attempts deletes even if a save fails. Clears state only on full success.
• Rollback (sync/async): deletes only files saved during the current transaction. Ignores FileNotFoundError. Logs and re-raises other errors. Clears state after processing.
• Tracking: records successful saves in _saved_in_transaction for targeted rollback cleanup; state is retained on error to allow inspection/retry.

Tests

• Sync/async save and delete error paths, including FileNotFoundError handling and BaseException bubbling.
• Override semantics: save cancels prior delete; delete cancels prior save.
• State behavior: clear on success; retain on error.
• Async specifics: delete still attempted even if a save fails; raises first failing Exception in input order; logs include exc_info for stack traces.