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>

scripts/update.sh

@@ -13,7 +13,7 @@
 # CI, piped), any conflict is a hard error unless --force is passed, which
 # accepts every new value automatically. Secrets and host-resolved values
 # (blank in .env.example — OMNIROUTE_*_SECRET/_KEY/_SALT/_PASSWORD,
-# SEARXNG_LAN_IP, COMFYUI_PUID/PGID, HOST_VIDEO_GID/RENDER_GID) are never
+# SEARXNG_LAN_IP, HOST_VIDEO_GID/RENDER_GID) are never
 # touched by this — they keep going through set_if_blank as before.
 #
 # omniroute's own routing/provider config (llama-server, search) lives in
@@ -196,12 +196,6 @@ else
   echo "SEARXNG_LAN_IP: couldn't resolve search.home from this host, set it manually if still blank."
 fi
 
-echo "==> resolving ComfyUI host UID"
-# yurisasc/comfyui-rocm7.1 wants these as env vars, not just group_add in
-# compose — resolve from this host, same pattern as SEARXNG_LAN_IP.
-set_if_blank COMFYUI_PUID "$(id -u)"
-set_if_blank COMFYUI_PGID "$(id -g)"
-
 echo "==> resolving host video/render GIDs (shared by every GPU service)"
 # Numeric GIDs, not names, in docker-compose.yml's group_add: — Docker
 # resolves a *named* group_add entry against the container's own /etc/group,