docs(architecture): remove revision history, add PUT /caddy/routes/{id} to API reference

ARCHITECTURE.md

@@ -1,21 +1,10 @@
 # GhostGrid
 ## Architecture Reference
 
-**Version:** 1.1
-**Date:** June 8, 2026
 **Status:** Living document — single source of truth for the codebase
 
 > Use this document as the starting context for any future task on GhostGrid. It describes the whole application: purpose, stack, file layout, data model, REST API, frontend structure, integrations, background jobs, security, and deployment.
 
-### Revision History
-
-| Version | Date | Changes |
-|---------|------|---------|
-| 1.3 | Jun 8, 2026 | Auto-import Caddyfile on first Caddy enable; default admin user on first start |
-| 1.2 | Jun 8, 2026 | Removed `caddy_prod_domain` / `caddy_dev_domain` settings; Caddy now routes only custom entries |
-| 1.1 | Jun 8, 2026 | Dropped the migration layer (fresh-install schema); renamed the `caddy_routes` table to `caddy` |
-| 1.0 | Jun 8, 2026 | Initial architecture reference generated from the codebase |
-
 ---
 
 ## 1. Executive Summary
@@ -387,6 +376,7 @@ All `/api/*` routes return JSON. Every route except the public auth/config endpo
     +-- GET    /status                  # Caddy admin API reachable?                 [auth]
     +-- GET    /routes                  # { system, custom } routes                  [auth]
     +-- POST   /routes                  # Add custom route + push config             [auth]
+    +-- PUT    /routes/{id}             # Update custom route + push config          [auth]
     +-- DELETE /routes/{id}             # Remove custom route + push config          [auth]
 ```