Initial commit: PymesBot Demo with IA integration

- FastAPI backend with WebSocket chat
- SQLite database for products
- Z.AI (GLM-4.7) integration for AI responses
- Docker deployment ready
- Caddy proxy configuration

pymesbot/backend/requirements.txt

@@ -0,0 +1,10 @@
+fastapi==0.110.0
+uvicorn[standard]==0.29.0
+jinja2==3.1.3
+python-multipart==0.0.9
+aiosqlite==0.20.0
+openpyxl==3.1.2
+pandas==2.2.0
+python-dotenv==1.0.1
+aiofiles==23.2.1
+httpx==0.27.0