## Summary
- make the already-merged recovery fixture explicit that no maintenance
sweep owns terminal-failure recovery
- preserve the fail-open `task-wedged` notification assertion when no
landed commit is found
## Test plan
- `corepack pnpm --filter @fusion/engine exec vitest run
--silent=passed-only --reporter=dot src/__tests__/self-healing.test.ts`
(460 passed)
- `corepack pnpm --filter @fusion/engine typecheck`
- `node scripts/run-static-gate-checks.mjs` (12 passed)
- `corepack pnpm --filter @fusion/engine test:core` (422 passed)
- `corepack pnpm --filter @fusion/core test:unit-gate` (184 passed)
- `corepack pnpm --filter @runfusion/fusion test:ci-shape` (71 passed)
- `corepack pnpm test:gate` reaches the PostgreSQL harness but cannot
authenticate locally (`empty password returned by client`) before
product assertions
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Tests**
* Updated failure-notification test conditions to cover scenarios
without automatic maintenance processing.
* Added coverage confirming terminal-failure notifications fail open
when no maintenance sweep owns the task.
* Bypassed production debounce timing to make the test behavior
deterministic.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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