fix(lint): ruff auto-fix + lewooogo-core src 加入 git

- Python: ruff --fix 修復 280 個 lint 錯誤
- lewooogo-core: src/ 目錄未追蹤，導致 CI eslint 失敗

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/db/models.py

@@ -10,25 +10,26 @@ Schema 設計原則：
 - 索引優化查詢
 """
 
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from typing import Any
 from uuid import uuid4
 
 from sqlalchemy import (
+    JSON,
     DateTime,
-    Enum as SQLEnum,
     Index,
     Integer,
     String,
     Text,
-    JSON,
+)
+from sqlalchemy import (
+    Enum as SQLEnum,
 )
 from sqlalchemy.orm import Mapped, mapped_column
 
 from src.db.base import Base
 from src.models.approval import ApprovalStatus, RiskLevel
-from src.models.incident import Severity, IncidentStatus
-
+from src.models.incident import IncidentStatus, Severity
 
 # =============================================================================
 # Helper Functions
@@ -36,7 +37,7 @@ from src.models.incident import Severity, IncidentStatus
 
 def utc_now() -> datetime:
     """Get current UTC datetime"""
-    return datetime.now(timezone.utc)
+    return datetime.now(UTC)
 
 
 def generate_uuid() -> str: