fix: resolve baked-in merge conflict markers in session log

The rotation script committed conflict markers from a prior merge.
Resolved to single Cleanup entry with proper END LOG marker.

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

Author: hooman

CLAUDE_SESSION_LOG.md

@@ -364,14 +364,6 @@ gaps, and observations.
 **Validation:** 261 entries PASS; 17 briefs PASS.
 **Staging consumed:** `staging/session_22/` deleted.
 
-### 2026-03-05 — Code — Cleanup
-<<<<<<< HEAD
-
-**Log rotation.** Pruned 1 resolved pair(s) (Chat Integration Request + Code Integration Complete). Git history preserves full record.
-=======
-
-**Log rotation.** Pruned 1 resolved pair(s) (Chat Integration Request + Code Integration Complete). Git history preserves full record.
-
 ### 2026-03-05 — Code — Cleanup
 
 **Log rotation.** Pruned 1 resolved pair(s) (Chat Integration Request + Code Integration Complete). Git history preserves full record.