* feat(execution): introduce execution context management with UUID support
- Added `execution.py` to manage execution UUIDs for tracking nested execution contexts.
- Implemented `begin_execution` and `end_execution` functions to handle the lifecycle of execution contexts.
- Updated `Crew` and `Flow` classes to utilize the new execution context management, ensuring proper tracking during execution.
- Added tests for execution UUID creation, inheritance, and lifecycle management to ensure functionality and correctness.
* feat(execution): enhance execution context management in Crew class
- Introduced `begin_execution` and `end_execution` calls in the `Crew` class to manage execution tokens effectively.
- Updated the `akickoff` method to ensure proper lifecycle handling of execution contexts.
- Added tests to verify the creation and clearing of execution UUIDs during the `akickoff` process, ensuring correct behavior in various scenarios.
* feat(execution): add execution_uuid to PendingFeedbackContext for flow resumption
- Introduced `execution_uuid` to the `PendingFeedbackContext` class to maintain the UUID across flow pauses and resumes, ensuring traceability of execution contexts.
- Updated the `Flow` class to utilize the new `execution_uuid` during execution management, enhancing the handling of paused flows.
- Added tests to verify that the execution UUID is correctly persisted and restored during flow operations, ensuring consistent behavior across sessions.
* refactor(execution): streamline execution UUID management and update tests
- Removed the `ensure_execution_uuid` function to simplify UUID handling, consolidating logic into `begin_execution` and `end_execution`.
- Updated the `clear_execution_uuid` function to ensure it correctly restores previous UUIDs using context tokens.
- Modified tests to reflect changes in execution UUID management, ensuring proper creation, inheritance, and clearing of UUIDs during execution contexts.
- Enhanced the `PendingFeedbackContext` documentation to clarify the handling of `execution_uuid` for pending rows.
