feat: add backend service and Azure deployment workflow

- Add complete Python backend (Litestar + LangGraph) with chat, conversations, tickets APIs
- Add GitHub Actions workflow for auto-deploying backend to Azure Web App (soc-backend)
- Add gunicorn to requirements.txt for production serving
- Update CLAUDE.md and EXTERNAL_SERVICES.md with latest config
- Remove obsolete claudehd.md (merged into gpthd.md)

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

config/mcporter.json

@@ -0,0 +1,8 @@
+{
+  "mcpServers": {
+    "cursor-project-memory": {
+      "baseUrl": "http://172.188.219.174:3101/mcp"
+    }
+  },
+  "imports": []
+}