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>

docker-compose.yml

@@ -0,0 +1,76 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: pgvector/pgvector:pg16
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+      - ./migrations:/docker-entrypoint-initdb.d
+    environment:
+      POSTGRES_DB: pkm
+      POSTGRES_USER: pkm
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U pkm"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    restart: unless-stopped
+
+  kordoc-service:
+    build: ./services/kordoc
+    ports:
+      - "3100:3100"
+    volumes:
+      - ${NAS_SMB_PATH:-/Volumes/Document_Server}:/documents:ro
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:3100/health"]
+      interval: 10s
+      timeout: 5s
+      retries: 3
+    restart: unless-stopped
+
+  fastapi:
+    build: ./app
+    ports:
+      - "8000:8000"
+    volumes:
+      - ${NAS_SMB_PATH:-/Volumes/Document_Server}:/documents
+    depends_on:
+      postgres:
+        condition: service_healthy
+      kordoc-service:
+        condition: service_healthy
+    env_file:
+      - credentials.env
+    environment:
+      - DATABASE_URL=postgresql+asyncpg://pkm:${POSTGRES_PASSWORD}@postgres:5432/pkm
+      - KORDOC_ENDPOINT=http://kordoc-service:3100
+    restart: unless-stopped
+
+  frontend:
+    build: ./frontend
+    ports:
+      - "3000:3000"
+    depends_on:
+      - fastapi
+    restart: unless-stopped
+
+  caddy:
+    image: caddy:2
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile
+      - caddy_data:/data
+    depends_on:
+      - fastapi
+      - frontend
+    restart: unless-stopped
+
+volumes:
+  pgdata:
+  caddy_data: