feat: add dedicated /api/address-book REST endpoint for inter-service access

Bearer token auth (ADDRESSBOOK_API_KEY) for external tools like avizare.
Supports GET (list/search/filter/by-id), POST (create), PUT (update), DELETE.
Middleware exclusion so it bypasses NextAuth session requirement.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -56,6 +56,8 @@ services:
       - NOTIFICATION_FROM_EMAIL=noreply@beletage.ro
       - NOTIFICATION_FROM_NAME=Alerte Termene
       - NOTIFICATION_CRON_SECRET=1547a198feca43af6c05622588c6d3b820bad5163b8c20175b2b5bbf8fc1a987
+      # Address Book API (inter-service auth for external tools)
+      - ADDRESSBOOK_API_KEY=abook-7f3e9a2b4c1d8e5f6a0b3c7d9e2f4a1b5c8d0e3f6a9b2c5d8e1f4a7b0c3d6e
     depends_on:
       dwg2dxf:
         condition: service_healthy