Aligns tests/unit/database.test.ts with the existing convention in
oauth-login-service/credential-resolver/credential-store tests: set
AGENTCOMPANY_ALLOW_INSECURE_VAULT=true in beforeAll so the in-memory
database test can call saveSecret without a real OS keychain.
Follow-up to aa1afd0 which removed the NODE_ENV=test/VITEST auto-enable.
- Rewrite checkoutTask to use runId-based CAS with checkout_run_id IS NULL guard
- Add releaseTaskLock and recoverStaleLocks methods
- Add lock release in finishRun and cancelRunForDeletion exit paths
- Add migration 16: pending_wakes to wakeup_requests cutover with DROP TABLE
- Replace all pending_wakes references with wakeup_requests
- Add wakeup lifecycle CRUD: enqueue, claim, complete, defer, promote, list
- Update api-server, orchestration-service, worker-service callers
- Update existing database.test.ts for new checkoutTask signature
ZacharyZhang-NY
