fix(CQ-WEB-2): Fix missing dependency in FilterBar useEffect

The debounced search useEffect accessed `filters` and `onFilterChange`
without including them in the dependency array. Fixed by:
- Using useRef for onFilterChange to maintain a stable reference
- Using functional state update (setFilters callback) to access
  previous filters without needing it as a dependency

This prevents stale closures while avoiding infinite re-render loops
that would occur if these values were added directly to the dep array.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/claude/orchestrator.md

@@ -38,6 +38,12 @@ The orchestrator **cold-starts** with just a review report location and minimal
 **If you find yourself about to edit source code, STOP.**
 Spawn a worker instead. No exceptions. No "quick fixes."
 
+**Worker Limits:**
+
+- Maximum **2 parallel workers** at any time
+- Wait for at least one worker to complete before spawning more
+- This optimizes token usage and reduces context pressure
+
 ---
 
 ## Bootstrap Templates