docs(02): complete docker integration phase

Phase 2 complete with 2 plans:
- 02-01: Docker socket configuration
- 02-02: Docker query workflow

Delivers: REQ-02 (container status queries)
- "status" returns container summary
- "status <name>" returns detailed container info
- Fuzzy matching for container names

Ready for Phase 3: Container Actions

.planning/phases/02-docker-integration/02-02-SUMMARY.md

@@ -0,0 +1,114 @@
+---
+phase: 02-docker-integration
+plan: 02
+subsystem: api
+tags: [n8n, docker-api, telegram, fuzzy-matching, workflow]
+
+requires:
+  - phase: 02-docker-integration/01
+    provides: Docker socket access from n8n container
+  - phase: 01-foundation
+    provides: Telegram trigger and authentication workflow
+
+provides:
+  - Docker container status queries via Telegram
+  - Fuzzy container name matching
+  - Summary and detailed container views
+
+affects: [03-container-actions, 04-logs-intelligence]
+
+tech-stack:
+  added: []
+  patterns: [execute-command-curl, switch-routing, fuzzy-match]
+
+key-files:
+  created: []
+  modified: [n8n-workflow.json]
+
+key-decisions:
+  - "Use curl -s flag to suppress stderr progress output"
+  - "Only validate stdout JSON, ignore stderr for error detection"
+  - "Simple substring matching for container names (no external library)"
+
+patterns-established:
+  - "Execute Command node with curl for Docker API queries"
+  - "Code nodes for JSON parsing and response formatting"
+  - "Switch node for message routing based on content"
+
+duration: ~30min
+completed: 2026-01-29
+---
+
+# Phase 2 Plan 02: Docker Query Workflow Summary
+
+**n8n workflow extended with Docker query capability - status summaries and container details via Telegram**
+
+## Performance
+
+- **Duration:** ~30 min
+- **Started:** 2026-01-29T14:35:00Z
+- **Completed:** 2026-01-29T15:05:00Z
+- **Tasks:** 3
+- **Files modified:** 1
+
+## Accomplishments
+
+- Added Switch node to route "status" messages to Docker query branch
+- Execute Command node queries Docker API via Unix socket with curl
+- Code nodes parse JSON, implement fuzzy container name matching, and format responses
+- Emoji status indicators (✅ running, ❌ stopped, etc.)
+- Summary view shows container counts by state
+- Detail view shows name, state, status, image, and ID
+- Echo branch preserved for non-docker messages
+
+## Task Commits
+
+1. **Task 1: Add Docker Query Branch to Workflow** - `1252ff4` (feat)
+2. **Bug fix: False positive docker error** - `8e155c5` (fix)
+
+**Plan metadata:** (this commit)
+
+## Files Created/Modified
+
+- `n8n-workflow.json` - Extended with Docker query branch (5 new nodes)
+
+## Decisions Made
+
+| Decision | Rationale |
+|----------|-----------|
+| Use curl -s (silent) flag | Suppresses progress output to stderr that caused false error detection |
+| Validate only stdout for errors | stderr contains curl progress info even on success |
+| Simple substring matching | No external library needed, works well for container names |
+| Strip linuxserver-/binhex- prefixes | Common Unraid container naming patterns |
+
+## Deviations from Plan
+
+### Bug Fix: stderr False Positive
+
+- **Found during:** Task 3 (verification)
+- **Issue:** curl writes progress to stderr even on success, triggering error handler
+- **Fix:** Added -s flag to curl, changed error check to only validate stdout JSON
+- **Committed in:** 8e155c5
+
+---
+
+**Total deviations:** 1 bug fix during verification
+**Impact on plan:** Minor fix, no scope change
+
+## Issues Encountered
+
+- Initial error handling checked for any stderr content, but curl writes progress info there even on success. Fixed by using -s flag and only checking stdout validity.
+
+## User Setup Required
+
+None - workflow file updated, user imports into n8n.
+
+## Next Phase Readiness
+
+- Docker query capability complete and verified
+- Foundation ready for Phase 3: Container Actions (start/stop/restart)
+- Fuzzy matching pattern established for reuse in action commands
+
+---
+*Phase: 02-docker-integration*
+*Completed: 2026-01-29*