feat(04-03): add matrix bot containerization

- add Dockerfile for matrix bot runtime
- add compose service and env template entries

.env.example

@@ -9,6 +9,9 @@ MATRIX_PASSWORD=your_password_here
 # Lambda Platform
 LAMBDA_PLATFORM_URL=http://localhost:8000
 LAMBDA_SERVICE_TOKEN=your_service_token_here
+AGENT_WS_URL=ws://127.0.0.1:8000/agent_ws/
+AGENT_BASE_URL=http://127.0.0.1:8000
+MATRIX_PLATFORM_BACKEND=real
 
 # Режим работы: "mock" или "production"
 PLATFORM_MODE=mock