refactor: split ai/ into hermes/ and ollama/ directories

- Rename ai/ to hermes/ (Hermes agent service)
- Move ai/ollama/ to ollama/ (top-level, Ollama ROCm/gfx906 service)
- Add ollama/compose.yml for standalone ollama deployment
- Update hermes/compose.yml: remove ollama service (now in ollama/)
- Update Makefile SERVICES list: ai -> hermes, add ollama
- Bump ollama version from v0.13.5 to v0.23.2

hermes/compose.yml

@@ -0,0 +1,38 @@
+version: "3.8"
+services:
+
+  hermes:
+    build: ./
+    container_name: hermes
+    restart: always
+    # Gateway run enables the internal API server on port 8642
+    command: gateway run
+    environment:
+      - OLLAMA_HOST=http://ollama:11434
+      - API_SERVER_ENABLED=true
+      - API_SERVER_PORT=8642
+      - API_SERVER_HOST=0.0.0.0
+      - API_SERVER_KEY=hermes_local_key
+      - GATEWAY_ALLOW_ALL_USERS=true
+      - OPENROUTER_API_KEY=${OPEN...KEY}
+      # ROCm for GPU-accelerated faster-whisper STT
+      - HSA_OVERRIDE_GFX_VERSION=9.0.6
+      - HCC_AMDGPU_TARGET=gfx906
+      - HIP_VISIBLE_DEVICES=0,1
+      - ROCR_VISIBLE_DEVICES=0,1
+      - HSA_ENABLE_SDMA=0
+    volumes:
+      - /mnt/HoardingCow_docker_data/Hermes/data:/opt/data
+    devices:
+      - /dev/kfd:/dev/kfd
+      - /dev/dri:/dev/dri
+    group_add:
+      - "303"
+      - "26"
+    networks:
+      - ai_backend
+
+networks:
+  ai_backend:
+    external: true
+    name: ai_backend