Make Every Code execution lease-safe#1722
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…overy (#1693) Implements atomic claim leases with `lease_expires_at`, monotonic `fencing_token` (= `attempt` counter), and heartbeat/stale-recovery endpoints so process death and multi-worker races no longer leave requests permanently stuck in claimed/running. - Contract: lease/fencing/attempt fields, heartbeat model, stale recovery policy (safe_requeue ≤3 attempts, manual_review >3), fencing-token guard on status updates, idempotent requeue for active states - Migration be91f3a5c7d2: idempotent ADD COLUMN + index on (state, lease_expires_at) - Postgres/filesystem stores: new columns, heartbeat record method, list_stale query - HTTP app: POST /v1/every-code/work-requests/heartbeat (409 on wrong owner), POST /v1/every-code/work-requests/recover-stale (safe_requeue or manual_review per policy) - Worker: background heartbeat thread, fencing token threaded through status updates, stale recovery maintenance step - Tests: 10 new PostgreSQL concurrency/lease tests covering two-worker exclusion, heartbeat accept/reject, stale listing, safe-requeue, process-death attempt increment, lost-response fencing rejection Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> # Conflicts: # control_plane/http_app.py
…t-leases # Conflicts: # control_plane/storage/schema_invariants.py
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Summary
Validation
uv run --extra dev launchplane ci unittest-shard local(12/12 shards, 1,925 targets)LAUNCHPLANE_TEST_POSTGRES_URL=... uv run --extra dev launchplane ci postgres-integration(24 tests)uv run --extra dev mypy control_plane testspnpm --dir frontend validateCloses #1693