chore: format code and remove redundant blank lines

This commit applies automated code formatting across the project. The changes primarily involve removing unnecessary blank lines and ensuring consistent code style, improving readability and maintainability without altering functionality.

src/common/database/monthly_plan_db.py

@@ -62,10 +62,12 @@ def get_active_plans_for_month(month: str) -> List[MonthlyPlan]:
     """
     with get_db_session() as session:
         try:
-            plans = session.query(MonthlyPlan).filter(
-                MonthlyPlan.target_month == month,
-                MonthlyPlan.status == 'active'
-            ).order_by(MonthlyPlan.created_at.desc()).all()
+            plans = (
+                session.query(MonthlyPlan)
+                .filter(MonthlyPlan.target_month == month, MonthlyPlan.status == "active")
+                .order_by(MonthlyPlan.created_at.desc())
+                .all()
+            )
             return plans
         except Exception as e:
             logger.error(f"查询 {month} 的有效月度计划时发生错误: {e}")