T10: Monitoring, Performance, Documentation & Environment Config — 38 tests, ruff clean, docs OK

- Extended health endpoint: DB+Redis+Storage+Worker checks with degraded status
- Prometheus metrics endpoint: admin-only, text/plain format
- Metrics: http_requests_total, db_pool_connections, arq_jobs_total
- Structured JSON logging (structlog): timestamp, level, method, path, status, duration_ms, tenant_id
- Performance: page_size max 100 enforced (422), streaming CSV export (StreamingResponse)
- Scripts: seed_perf_data.py, check_indexes.py
- Docs: admin-guide.md (Deploy, Backup, Restore, Env-Vars, Troubleshooting), api-overview.md
- README updated: prod setup, API section, env profiles, admin-guide link
- .env.example: added SECRET_KEY, STORAGE_PATH, SMTP_* vars
- 38 new tests, full regression 564/564 pass (0 failures)
- Ruff: all checks passed

.a0/next_steps.md

@@ -1,7 +1,14 @@
-# LeoCRM — Next Steps
-1. **User decision needed**: Which task next?
-   - T08c: Frontend Mail UI + Global Search UI (prerequisite T06 ✅ — unblocked)
-   - T10: Monitoring, Performance, Documentation & Environment Config
-2. After task selection: delegate to implementation_engineer with briefing
-3. After implementation: test_debug_engineer for validation
-4. Phase 3 → Phase 4 transition requires user approval
+# Next Steps — LeoCRM
+
+**Last Updated**: 2026-07-01 23:02
+**Completed**: T10 — Monitoring, Performance, Documentation & Environment Config
+
+## Immediate
+1. Run full test suite to check for regressions: `pytest -v --tb=short`
+2. Verify AC11 (ARQ background job for >1000 records CSV export) — requires ARQ worker running
+3. Commit T10 changes to git
+
+## Upcoming
+- T11: Next task in task graph (check task_graph.json)
+- Run performance test with seed_perf_data.py --count 200000 against test DB
+- Verify Prometheus metrics scrape endpoint with Prometheus/Grafana