fix(comfyui): add missing launch command, drop dead PUID/PGID vars

yurisasc/comfyui-rocm7.1 has no entrypoint/CMD of its own (drops into
bash) and never reads PUID/PGID/VIDEO_GID/RENDER_GID/BASE_STORAGE_PATH
- confirmed by inspecting the image directly. Without an explicit
command the container just exits 0 immediately and restart-loops
forever with zero log output, which is what was actually blocking
comfyui.home/8138, unrelated to the earlier GGUF model swap.

Add `command: python main.py --listen 0.0.0.0 --port 8188
--base-directory /storage` (the real way to point it at the storage
volume) and remove COMFYUI_PUID/COMFYUI_PGID, since nothing consumes
them.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docker-compose.yml

@@ -233,21 +233,23 @@ services:
     environment:
       - HSA_OVERRIDE_GFX_VERSION=12.0.1
       - PYTORCH_ROCM_ARCH=gfx1201
-      # This image also wants GID env vars directly (its own README asks
-      # for both these and group_add above) — same HOST_VIDEO_GID/
-      # HOST_RENDER_GID resolved by scripts/update.sh, shared with
-      # llama-server now instead of comfyui-only vars.
-      - PUID=${COMFYUI_PUID}
-      - PGID=${COMFYUI_PGID}
-      - VIDEO_GID=${HOST_VIDEO_GID}
-      - RENDER_GID=${HOST_RENDER_GID}
-      - BASE_STORAGE_PATH=/storage
     volumes:
       - comfyui-data:/storage
-    # ponytail: exact internal storage path taken from the image's own
-    # BASE_STORAGE_PATH env var, not independently confirmed against its
-    # Dockerfile — if models/workflows don't persist across a recreate,
-    # check this against the image's actual entrypoint first.
+    # yurisasc/comfyui-rocm7.1 has no entrypoint/CMD of its own (just drops
+    # into bash) and doesn't read PUID/PGID/VIDEO_GID/RENDER_GID or
+    # BASE_STORAGE_PATH — confirmed by inspecting the image directly, so
+    # this command is required, not optional, or the container exits 0
+    # immediately and restart-loops. Runs as root (image's only user);
+    # group_add above is what actually grants /dev/kfd + /dev/dri access.
+    command:
+      - python
+      - main.py
+      - --listen
+      - "0.0.0.0"
+      - --port
+      - "8188"
+      - --base-directory
+      - /storage
     #
     # Published host port (unlike llama-server's ai-stack-only pattern):
     # ComfyUI's own UI is meant to be reachable directly too, for a planned