fix: update Honcho config path to HoardingCow, point fork to Hermes/honcho

- Update Dockerfile to clone from code.lazyworkhorse.net/Hermes/honcho.git
  (uses build arg HONCHO_REPO, can be overridden at build time)
- Add config.toml volume mount from HoardingCow persistent path
- Use named volume honcho_data instead of host bind mount
- Declare honcho_data as external volume in top-level volumes section

ai/compose.yml

@@ -175,7 +175,8 @@ services:
       - AUTH_JWT_SECRET=${AUTH_JWT_SECRET}
       - OPENAI_API_KEY=${OPENAI_API_KEY}
     volumes:
-      - /mnt/HoardingCow_docker_data/Honcho/data:/app/data
+      - honcho_data:/app/data
+      - /mnt/HoardingCow_docker_data/Honcho/config.toml:/app/config.toml:ro
     networks:
       - ai_backend
       - ai_net
@@ -248,6 +249,11 @@ networks:
   ai_backend:
     driver: bridge
     name: ai_backend
+
+volumes:
+  honcho_data:
+    external: true
+    name: honcho_data
     
   # llama_cpp_devstral:
   #   image: ghcr.io/ggml-org/llama.cpp:server-rocm