docs(10): checkpoint - waves 1-3 complete, wave 4 pending

Completed:
- 10-01: Orphan cleanup (2 nodes removed)
- 10-02: Container Update sub-workflow (31 nodes)
- 10-03: Container Actions sub-workflow (8 nodes)
- 10-04: Integration verified with user

Pending:
- 10-05: Wire batch ops to sub-workflows, extract logs

Key fixes applied:
- n8n typeVersion 1.2 requires __rl resource locator format
- Docker 204 success detection via empty response check

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.planning/phases/10-workflow-modularization/10-04-SUMMARY.md

@@ -0,0 +1,19 @@
+---
+phase: 10-workflow-modularization
+plan: 04
+completed: 2026-02-04
+---
+
+# Phase 10 Plan 4: Integration Verification Summary
+
+**User verified modularized workflow works correctly**
+
+## Status
+- ✓ Stop action works via inline keyboard
+- ✓ Success message displays correctly  
+- ✓ Sub-workflows callable from main workflow
+
+## Remaining: Plan 10-05
+- Wire batch operations to sub-workflows
+- Extract logs to sub-workflow
+- Target: reduce main workflow from 209 to ~120-140 nodes