feat: implement Ansible-based process architecture for RunPod

Major architecture overhaul to address RunPod Docker limitations:

Core Infrastructure:
- Add base_service.py: Abstract base class for all AI services
- Add service_manager.py: Process lifecycle management
- Add core/requirements.txt: Core dependencies

Model Services (Standalone Python):
- Add models/vllm/server.py: Qwen 2.5 7B text generation
- Add models/flux/server.py: Flux.1 Schnell image generation
- Add models/musicgen/server.py: MusicGen Medium music generation
- Each service inherits from GPUService base class
- OpenAI-compatible APIs
- Standalone execution support

Ansible Deployment:
- Add playbook.yml: Comprehensive deployment automation
- Add ansible.cfg: Ansible configuration
- Add inventory.yml: Localhost inventory
- Tags: base, python, dependencies, models, tailscale, validate, cleanup

Scripts:
- Add scripts/install.sh: Full installation wrapper
- Add scripts/download-models.sh: Model download wrapper
- Add scripts/start-all.sh: Start orchestrator
- Add scripts/stop-all.sh: Stop all services

Documentation:
- Update ARCHITECTURE.md: Document distributed VPS+GPU architecture

Benefits:
- No Docker: Avoids RunPod CAP_SYS_ADMIN limitations
- Fully reproducible via Ansible
- Extensible: Add models in 3 steps
- Direct Python execution (no container overhead)

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

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

scripts/stop-all.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# Stop AI Services
+# Gracefully stops all running AI services
+#
+
+set -e
+
+echo "========================================="
+echo "  Stopping AI Services"
+echo "========================================="
+echo ""
+
+# Kill orchestrator and model processes
+echo "Stopping orchestrator..."
+pkill -f "orchestrator_subprocess.py" || echo "Orchestrator not running"
+
+echo "Stopping model services..."
+pkill -f "models/vllm/server.py" || echo "vLLM not running"
+pkill -f "models/flux/server.py" || echo "Flux not running"
+pkill -f "models/musicgen/server.py" || echo "MusicGen not running"
+
+echo ""
+echo "All services stopped"