Refactor lock backend constants and fix scheduler syntax error

- Extracted hardcoded retry/health constants from `src/lock-ops.mjs` to `src/constants.mjs`.
- Refactored `src/lock-ops.mjs` to use `LockPublisher` class pattern and shared constants.
- Fixed `SyntaxError` in `src/lock-ops.mjs` (function inside function).
- Fixed `ReferenceError` in `src/cmd-check.mjs` (`queryLocksFn` -> `queryLocks`).
- Verified with unit tests (`test:unit:lock-backend`) and linting.
- Completed daily scheduler cycle for `const-refactor-agent`.

Co-authored-by: PR0M3TH3AN <[email protected]>

task-logs/daily/2026-02-17T19-45-47Z__const-refactor-agent__completed.md

@@ -0,0 +1,15 @@
+---
+cadence: daily
+agent: const-refactor-agent
+status: completed
+reason: 'Scheduler cycle completed successfully'
+created_at: 2026-02-17T19-48-02Z
+timestamp: 2026-02-17T19-48-02Z
+platform: linux
+---
+
+# Scheduler completed
+
+- reason: Scheduler cycle completed successfully
+- platform: linux
+- details: Extracted lock backend constants to src/constants.mjs, refactored lock-ops.mjs, fixed cmd-check.mjs bug.