feat(cloud): add durable cancellation support to task repository

- Add nullable cancel_requested_at column (migration 0012)
- Widen ScheduledTaskStatus/TerminalTaskStatus to include cancelled
- Add CancellationRequestStatus + request_task_cancellation() to
  CloudRepository protocol and SQLAlchemy implementation
- renew_lease() now returns LeaseRenewalResult, surfacing whether
  cancellation is pending, instead of a bare status string
- reap_expired_leases() resolves pending-cancellation tasks to
  cancelled instead of requeuing/failing them
- record_task_result() accepts cancelled and clears
  cancel_requested_at on any terminal write

Note: internal_api/api.py's renew_assignment route still compares
renew_lease()'s return value against a bare string; it will be
updated in the next task (Internal Host<->Cloud protocol) to consume
LeaseRenewalResult and populate the new cancel_requested wire field.

This commit is contained in:

q792602257

2026-07-15 18:08:48 +08:00

parent 88189770ff

commit 19c6669800

9 changed files with 385 additions and 35 deletions

									
										packages/cloud-platform/cloud/schema.py
									
		+1
		-1
	
												View File
												
				@@ -9,7 +9,7 @@ from alembic.runtime.migration import MigrationContext

				from cloud.database import create_database_engine, normalize_database_url

				HEAD_REVISION = "0011_planner_decision_log_reflection"

				HEAD_REVISION = "0012_task_cancellation"

				class SchemaVersionError(RuntimeError):