#371 LOW: Logger message missing f-string prefix

## Issue In engine/orchestrator.py:577, logger message uses wrong format string: ```python logger.exception('Task {task_name} failed with error: ') # Missing f prefix ``` ## Impact Log message won't include actual task name. ## Location engine/orchestrator.py:577 ## Fix Change to: logger.exception(f'Task {task_name} failed with error: ')