feat: scaffold v2 project structure with Docker, FastAPI, and config

동작하는 최소 코드 수준의 v2 스캐폴딩:

- docker-compose.yml: postgres, fastapi, kordoc, frontend, caddy
- app/: FastAPI 백엔드 (main, core, models, ai, prompts)
- services/kordoc/: Node.js 문서 파싱 마이크로서비스
- gpu-server/: AI Gateway + GPU docker-compose
- frontend/: SvelteKit 기본 구조
- migrations/: PostgreSQL 초기 스키마 (documents, tasks, processing_queue)
- tests/: pytest conftest 기본 설정
- config.yaml, Caddyfile, credentials.env.example 갱신

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

gpu-server/docker-compose.yml

@@ -0,0 +1,33 @@
+version: '3.8'
+
+services:
+  ollama:
+    image: ollama/ollama
+    volumes:
+      - ollama_data:/root/.ollama
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: 1
+              capabilities: [gpu]
+    ports:
+      - "11434:11434"
+    restart: unless-stopped
+
+  ai-gateway:
+    build: ./services/ai-gateway
+    ports:
+      - "8080:8080"
+    environment:
+      - PRIMARY_ENDPOINT=${PRIMARY_ENDPOINT:-http://mac-mini:8800/v1/chat/completions}
+      - FALLBACK_ENDPOINT=http://ollama:11434/v1/chat/completions
+      - CLAUDE_API_KEY=${CLAUDE_API_KEY:-}
+      - DAILY_BUDGET_USD=${DAILY_BUDGET_USD:-5.00}
+    depends_on:
+      - ollama
+    restart: unless-stopped
+
+volumes:
+  ollama_data: