- Updated execution control methods (`PauseExecution`, `ResumeExecution`, `StopExecution`) to include error handling and database status updates for paused, running, and cancelled states.
- Introduced `ExecuteWithControl` method in the Executor interface to manage execution with pause/resume capabilities, allowing for better control during execution.
- Enhanced the `Execute` methods across different executors (DryRun, Sandbox, Standard) to support pre-generated execution IDs and control mechanisms.
- Improved error messages in the execution handling API to provide clearer feedback on execution status and errors.
- Added support for a new execution status `ExecPaused` in the execution model, enhancing the tracking of execution states.
- Updated the API documentation in TODO.md to reflect the completion of the Go API implementation and end-to-end tests for the main flow (P0 → P1 → P2 → P3 → P4).
- Clarified that Process handlers and JSAPI are optional features, moving them to Phase 12, while emphasizing that the Go API is sufficient for MVP integration.
- Removed obsolete API files (`api.go`, `jsapi.go`, `process.go`) as they were stubs and not implemented in Phase 10, streamlining the codebase.
- Revised the structure of the TODO.md to better outline the goals and tasks for Phases 11 and 12, ensuring clear tracking of progress and dependencies.
