WorkflowDraftVariable
- Introduce `WorkflowDraftVariable` model and the corresponding migration. - Implement `EnumText`, a custom column type for SQLAlchemy designed to work seamlessly with enumeration classes based on `StrEnum`.
Co-authored-by: -LAN- <[email protected]>
Signed-off-by: -LAN- <[email protected]> Co-authored-by: Joel <[email protected]> Co-authored-by: -LAN- <[email protected]>