feat: remove GPU support and simplify to CPU-only architecture

QUICKSTART.md

@@ -1,6 +1,6 @@
 # Quick Start Guide
 
-## 1. Local Development (CPU, ~2 minutes)
+## 1. Local Development (~2 minutes)
 
 ```bash
 # Clone or navigate to project
@@ -100,7 +100,7 @@ Try endpoints directly in Swagger UI!
 # Check system health
 curl http://localhost:8000/api/v1/health
 
-# Get detailed system info (CPU, memory, GPU, etc.)
+# Get detailed system info (CPU, memory, disk, etc.)
 curl http://localhost:8000/api/v1/system
 
 # Get API statistics
@@ -110,25 +110,7 @@ curl http://localhost:8000/api/v1/stats
 curl http://localhost:8000/api/v1/jobs
 ```
 
-## 6. GPU Setup (Optional, requires NVIDIA)
-
-```bash
-# Build with GPU support
-docker compose -f docker-compose.gpu.yml build
-
-# Run with GPU
-docker compose -f docker-compose.gpu.yml up -d
-
-# Verify GPU is accessible
-docker compose -f docker-compose.gpu.yml exec api nvidia-smi
-
-# Download models again on GPU
-curl -X POST http://localhost:8000/api/v1/models/download \
-  -H 'Content-Type: application/json' \
-  -d '{"models": ["RealESRGAN_x4plus"]}'
-```
-
-## 7. Production Deployment
+## 6. Production Deployment
 
 ```bash
 # Update docker-compose.prod.yml with your registry/domain