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>

app/core/config.py

@@ -0,0 +1,93 @@
+"""설정 로딩 — config.yaml + credentials.env"""
+
+import os
+from pathlib import Path
+
+import yaml
+from pydantic import BaseModel
+
+
+class AIModelConfig(BaseModel):
+    endpoint: str
+    model: str
+    max_tokens: int = 4096
+    timeout: int = 60
+    daily_budget_usd: float | None = None
+    require_explicit_trigger: bool = False
+
+
+class AIConfig(BaseModel):
+    gateway_endpoint: str
+    primary: AIModelConfig
+    fallback: AIModelConfig
+    premium: AIModelConfig
+    embedding: AIModelConfig
+    vision: AIModelConfig
+    rerank: AIModelConfig
+
+
+class Settings(BaseModel):
+    # DB
+    database_url: str = ""
+
+    # AI
+    ai: AIConfig | None = None
+
+    # NAS
+    nas_mount_path: str = "/documents"
+    nas_pkm_root: str = "/documents/PKM"
+
+    # 인증
+    jwt_secret: str = ""
+    totp_secret: str = ""
+
+    # kordoc
+    kordoc_endpoint: str = "http://kordoc-service:3100"
+
+
+def load_settings() -> Settings:
+    """config.yaml + 환경변수에서 설정 로딩"""
+    # 환경변수 (docker-compose에서 주입)
+    database_url = os.getenv("DATABASE_URL", "")
+    jwt_secret = os.getenv("JWT_SECRET", "")
+    totp_secret = os.getenv("TOTP_SECRET", "")
+    kordoc_endpoint = os.getenv("KORDOC_ENDPOINT", "http://kordoc-service:3100")
+
+    # config.yaml
+    config_path = Path(__file__).parent.parent.parent / "config.yaml"
+    ai_config = None
+    nas_mount = "/documents"
+    nas_pkm = "/documents/PKM"
+
+    if config_path.exists():
+        with open(config_path) as f:
+            raw = yaml.safe_load(f)
+
+        if "ai" in raw:
+            ai_raw = raw["ai"]
+            ai_config = AIConfig(
+                gateway_endpoint=ai_raw.get("gateway", {}).get("endpoint", ""),
+                primary=AIModelConfig(**ai_raw["models"]["primary"]),
+                fallback=AIModelConfig(**ai_raw["models"]["fallback"]),
+                premium=AIModelConfig(**ai_raw["models"]["premium"]),
+                embedding=AIModelConfig(**ai_raw["models"]["embedding"]),
+                vision=AIModelConfig(**ai_raw["models"]["vision"]),
+                rerank=AIModelConfig(**ai_raw["models"]["rerank"]),
+            )
+
+        if "nas" in raw:
+            nas_mount = raw["nas"].get("mount_path", nas_mount)
+            nas_pkm = raw["nas"].get("pkm_root", nas_pkm)
+
+    return Settings(
+        database_url=database_url,
+        ai=ai_config,
+        nas_mount_path=nas_mount,
+        nas_pkm_root=nas_pkm,
+        jwt_secret=jwt_secret,
+        totp_secret=totp_secret,
+        kordoc_endpoint=kordoc_endpoint,
+    )
+
+
+settings = load_settings()