docs: consolidate and update project documentation

- Fix port numbers across all docs (API :3001, Web :3000)
- Add 6 missing modules to README, CLAUDE.md, and architecture doc
  (agents, health, inquiries, leads, reviews, metrics/web-vitals)
- Add Swagger UI reference and /api/v1 prefix notes
- Create docs/api-endpoints.md with complete REST API reference
- Create docs/README.md as documentation index
- Update deployment guide with Loki, Promtail, pg-backup services
- Update health check table with all current endpoints

Co-Authored-By: Paperclip <noreply@paperclip.ing>

CLAUDE.md

@@ -45,13 +45,18 @@ pnpm dev                # Start all apps (API :3001, Web :3000)
 apps/api/src/modules/
   auth/          — Authentication (JWT, OAuth, refresh tokens, CSRF)
   listings/      — Property listings CRUD
-  payments/      — VNPay payment integration
+  payments/      — VNPay, MoMo, ZaloPay payment integration
   subscriptions/ — Plans, quotas, usage tracking
-  admin/         — Moderation, KYC, user management
-  analytics/     — Market data, heatmaps, price trends
-  search/        — Geo search, full-text search (Typesense)
-  notifications/ — Email, push (FCM), in-app notifications
-  metrics/       — Prometheus metrics
+  admin/         — Moderation, KYC, user management, audit logs
+  analytics/     — Market data, heatmaps, price trends, AVM
+  search/        — Geo search, full-text search (Typesense), saved searches
+  notifications/ — Email, in-app notifications
+  agents/        — Agent profiles, quality scores
+  inquiries/     — Property inquiry management
+  leads/         — Lead tracking and conversion
+  reviews/       — Property reviews and ratings
+  health/        — Liveness and readiness probes
+  metrics/       — Prometheus metrics, web vitals
   mcp/           — MCP tool server endpoints
   shared/        — Domain primitives, guards, pipes, logging
 ```