refactor: 统一日志管理 + 数据库索引优化

- db/schema.py: 添加 4 个复合索引优化查询性能
  - idx_user_schedules_user_enabled
  - idx_schedule_execution_logs_schedule_id/user_id/status
- db/users.py: print → logger，密码升级日志改为记录 user_id
- crypto_utils.py: print → logger
- password_utils.py: print → logger

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

db/schema.py

@@ -260,6 +260,11 @@ def ensure_schema(conn) -> None:
     cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_schedules_user_id ON user_schedules(user_id)")
     cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_schedules_enabled ON user_schedules(enabled)")
     cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_schedules_next_run ON user_schedules(next_run_at)")
+    # 复合索引优化
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_schedules_user_enabled ON user_schedules(user_id, enabled)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_schedule_execution_logs_schedule_id ON schedule_execution_logs(schedule_id)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_schedule_execution_logs_user_id ON schedule_execution_logs(user_id)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_schedule_execution_logs_status ON schedule_execution_logs(status)")
 
     # 初始化VIP配置（幂等）
     try:

db/users.py

@@ -6,6 +6,7 @@ import sqlite3
 from datetime import datetime, timedelta
 
 import pytz
+from app_logger import get_logger
 
 import db_pool
 from db.utils import get_cst_now_str
@@ -15,6 +16,7 @@ from password_utils import (
     verify_password_bcrypt,
     verify_password_sha256,
 )
+logger = get_logger(__name__)
 
 
 def get_vip_config():
@@ -79,7 +81,7 @@ def extend_user_vip(user_id, days):
                     expire_time = now
                 new_expire = (expire_time + timedelta(days=days)).strftime("%Y-%m-%d %H:%M:%S")
             except (ValueError, AttributeError) as e:
-                print(f"解析VIP过期时间失败: {e}, 使用当前时间")
+                logger.warning(f"解析VIP过期时间失败: {e}, 使用当前时间")
                 new_expire = (datetime.now(cst_tz) + timedelta(days=days)).strftime("%Y-%m-%d %H:%M:%S")
         else:
             new_expire = (datetime.now(cst_tz) + timedelta(days=days)).strftime("%Y-%m-%d %H:%M:%S")
@@ -115,7 +117,7 @@ def is_user_vip(user_id):
         now = datetime.now(cst_tz)
         return now < expire_time
     except (ValueError, AttributeError) as e:
-        print(f"检查VIP状态失败 (user_id={user_id}): {e}")
+        logger.warning(f"检查VIP状态失败 (user_id={user_id}): {e}")
         return False
 
 
@@ -140,7 +142,7 @@ def get_user_vip_info(user_id):
 
         return {"username": user.get("username", ""), "is_vip": is_vip, "expire_time": vip_expire_time, "days_left": max(0, days_left)}
     except Exception as e:
-        print(f"VIP信息获取错误: {e}")
+        logger.warning(f"VIP信息获取错误: {e}")
         return {"is_vip": False, "expire_time": None, "days_left": 0, "username": user.get("username", "")}
 
 
@@ -197,7 +199,7 @@ def verify_user(username, password):
                 new_hash = hash_password_bcrypt(password)
                 cursor.execute("UPDATE users SET password_hash = ? WHERE id = ?", (new_hash, user_dict["id"]))
                 conn.commit()
-                print(f"用户 {username} 密码已自动升级到bcrypt")
+                logger.info(f"用户密码已自动升级到bcrypt (user_id={user_dict['id']})")
                 return user_dict
             return None