Add Command Center v2: DQ/RAG integration, S3 browser, Jupyter, GPU matrix.

Mirror mo/atc-GPU layout with config/, docs/, scripts/ for Gitea deploy.

docker-compose.dockhand.yml

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+# Dockhand-managed compose — image-only (no build context on Dockhand host).
+# Source of truth for builds: /opt/atc-agents on VM304 (10.0.21.33).
+services:
+  redis:
+    image: redis:7-alpine
+    restart: unless-stopped
+    volumes:
+      - redis_data:/data
+
+  postgres:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: atc
+      POSTGRES_PASSWORD: atc-agents-pg
+      POSTGRES_DB: atc_agents
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U atc -d atc_agents"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  api:
+    image: atc-agents-api:latest
+    restart: unless-stopped
+    environment:
+      REDIS_URL: redis://redis:6379/0
+      DOCKHAND_URL: http://10.0.21.45:8082
+      DATABASE_URL: postgresql+psycopg2://atc:atc-agents-pg@postgres:5432/atc_agents
+      SQLITE_FALLBACK_PATH: /data/atc-agents.db
+      GPU_URL: http://10.0.20.106:9000
+      GPU_UI_URL: http://10.0.20.106:9000
+      LLM_URL: http://10.0.20.106:8001/v1
+      LLM_MODEL: qwen2.5-32b-gptq
+      LLM_API_KEY: sk-local
+      LAKEHOUSE_HOST: 10.0.21.50
+      AIRFLOW_URL: http://10.0.21.55:8080
+      KAFKA_UI_URL: http://10.0.21.36:9000
+      HDFS_NN_URL: http://10.0.21.61:9870
+    volumes:
+      - api_data:/data
+    depends_on:
+      redis:
+        condition: service_started
+      postgres:
+        condition: service_healthy
+
+  ui:
+    image: atc-agents-ui:latest
+    restart: unless-stopped
+    depends_on:
+      - api
+
+  caddy:
+    image: caddy:2-alpine
+    restart: unless-stopped
+    ports:
+      - "80:80"
+    volumes:
+      - ./caddy/Caddyfile:/etc/caddy/Caddyfile:ro
+    depends_on:
+      - ui
+      - api
+
+volumes:
+  redis_data:
+  postgres_data:
+  api_data: