구조적인 부분 수정

backend/app/main.py

@@ -24,9 +24,23 @@ from app.core.market_schedule import is_market_open
 from sqlalchemy import text
 
 # 로깅 설정
+import os
+import logging.handlers
+_log_level = getattr(logging, settings.LOG_LEVEL.upper(), logging.INFO)
+_log_format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+_log_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), "logs")
+os.makedirs(_log_dir, exist_ok=True)
+_log_file = os.path.join(_log_dir, "backend.log")
+
 logging.basicConfig(
-    level=getattr(logging, settings.LOG_LEVEL.upper(), logging.INFO),
-    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+    level=_log_level,
+    format=_log_format,
+    handlers=[
+        logging.StreamHandler(),
+        logging.handlers.RotatingFileHandler(
+            _log_file, maxBytes=10 * 1024 * 1024, backupCount=5, encoding="utf-8"
+        ),
+    ]
 )
 
 logger = logging.getLogger(__name__)
@@ -191,6 +205,20 @@ async def lifespan(app: FastAPI):
             ADD COLUMN IF NOT EXISTS ml_confidence NUMERIC(5, 4),
             ADD COLUMN IF NOT EXISTS ml_signal VARCHAR(10);
             """))
+            # UPSERT를 위한 unique constraint — init-db.sql에 없을 경우 자동 생성
+            await conn.execute(text("""
+            DO $$ BEGIN
+                IF NOT EXISTS (
+                    SELECT 1 FROM pg_constraint
+                    WHERE conname = 'uq_stock_analysis_code_date'
+                      AND conrelid = 'stock_analysis'::regclass
+                ) THEN
+                    ALTER TABLE stock_analysis
+                        ADD CONSTRAINT uq_stock_analysis_code_date
+                        UNIQUE (stock_code, analysis_date);
+                END IF;
+            END $$;
+            """))
             # active_trades에 분할 청산 컬럼 추가 (CLAUDE.md 섹션 7.3)
             await conn.execute(text("""
             ALTER TABLE active_trades