feat: add ComfyUI integration with Ansible playbook

- Add ComfyUI installation to Ansible playbook with 'comfyui' tag
- Create ComfyUI requirements.txt and start.sh script
- Clone ComfyUI from official GitHub repository
- Symlink HuggingFace cache for Flux model access
- ComfyUI runs on port 8188 with CORS enabled
- Add ComfyUI to services list in playbook

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

models/comfyui/requirements.txt

@@ -0,0 +1,12 @@
+torch
+torchvision
+torchaudio
+transformers
+diffusers
+accelerate
+safetensors
+omegaconf
+einops
+kornia
+spandrel
+soundfile

models/comfyui/start.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+#
+# ComfyUI Startup Script
+# Starts ComfyUI server on port 8188
+#
+
+WORKSPACE_DIR="${WORKSPACE_DIR:-/workspace}"
+COMFYUI_DIR="${WORKSPACE_DIR}/ComfyUI"
+HF_CACHE="${WORKSPACE_DIR}/huggingface_cache"
+
+# Set environment variables
+export PYTORCH_CUDA_ALLOC_CONF=expandable_segments:True
+export HF_HOME="${HF_CACHE}"
+
+# Navigate to ComfyUI directory
+cd "${COMFYUI_DIR}" || exit 1
+
+echo "Starting ComfyUI on port 8188..."
+echo "Access at: http://localhost:8188"
+echo "Using HuggingFace cache: ${HF_CACHE}"
+
+# Start ComfyUI with GPU support
+python3 main.py \
+  --listen 0.0.0.0 \
+  --port 8188 \
+  --enable-cors-header \
+  --preview-method auto
+
+echo "ComfyUI stopped"