Fix race condition in cmdLock sort order

- Add deterministic tie-breaker (eventId) for lock events with identical timestamps in `src/lib.mjs`.
- Add regression tests in `test/lib.test.mjs` verifying win/loss conditions.
- Create weekly race condition report and run artifacts.
- Mark `race-condition-agent` task as completed.

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

src/context/CONTEXT_2026-02-15T15-22-42Z.md

@@ -0,0 +1,15 @@
+---
+agent: race-condition-agent
+cadence: weekly
+run-start: 2026-02-15T15:22:42Z
+prompt: src/prompts/weekly/race-condition-agent.md
+---
+Goal: Audit for race conditions and fix one.
+
+Scope:
+- Shared Client and Relay Pool (`src/lib.mjs`, `src/lock-ops.mjs`)
+- Lock acquisition logic
+
+Constraints:
+- Non-breaking changes
+- One fix per run