feat(config): add live slow-sql threshold setting

db/admin.py

@@ -17,6 +17,7 @@ _DEFAULT_SYSTEM_CONFIG = {
     "max_concurrent_global": 2,
     "max_concurrent_per_account": 1,
     "max_screenshot_concurrent": 3,
+    "db_slow_query_ms": 120,
     "schedule_enabled": 0,
     "schedule_time": "02:00",
     "schedule_browse_type": "应读",
@@ -49,6 +50,7 @@ _SYSTEM_CONFIG_UPDATERS = (
     ("schedule_weekdays", "schedule_weekdays"),
     ("max_concurrent_per_account", "max_concurrent_per_account"),
     ("max_screenshot_concurrent", "max_screenshot_concurrent"),
+    ("db_slow_query_ms", "db_slow_query_ms"),
     ("enable_screenshot", "enable_screenshot"),
     ("proxy_enabled", "proxy_enabled"),
     ("proxy_api_url", "proxy_api_url"),
@@ -265,6 +267,7 @@ def update_system_config(
     kdocs_admin_notify_email=None,
     kdocs_row_start=None,
     kdocs_row_end=None,
+    db_slow_query_ms=None,
 ) -> bool:
     """更新系统配置（仅更新DB，不做缓存处理）。"""
     arg_values = {
@@ -293,6 +296,7 @@ def update_system_config(
         "kdocs_admin_notify_email": kdocs_admin_notify_email,
         "kdocs_row_start": kdocs_row_start,
         "kdocs_row_end": kdocs_row_end,
+        "db_slow_query_ms": db_slow_query_ms,
     }
 
     updates = []

db/migrations.py

@@ -74,6 +74,7 @@ def _get_migration_steps():
         (17, _migrate_to_v17),
         (18, _migrate_to_v18),
         (19, _migrate_to_v19),
+        (20, _migrate_to_v20),
     ]
 
 
@@ -884,3 +885,21 @@ def _migrate_to_v19(conn):
         cursor.execute(statement)
 
     conn.commit()
+
+
+
+def _migrate_to_v20(conn):
+    """迁移到版本20 - 慢SQL阈值系统配置"""
+    cursor = conn.cursor()
+
+    columns = _get_table_columns(cursor, "system_config")
+    _add_column_if_missing(
+        cursor,
+        "system_config",
+        columns,
+        "db_slow_query_ms",
+        "INTEGER DEFAULT 120",
+        ok_message="  [OK] 添加 system_config.db_slow_query_ms 字段",
+    )
+
+    conn.commit()

db/schema.py

@@ -210,6 +210,7 @@ def ensure_schema(conn) -> None:
             proxy_expire_minutes INTEGER DEFAULT 3,
             max_screenshot_concurrent INTEGER DEFAULT 3,
             max_concurrent_per_account INTEGER DEFAULT 1,
+            db_slow_query_ms INTEGER DEFAULT 120,
             schedule_weekdays TEXT DEFAULT '1,2,3,4,5,6,7',
             enable_screenshot INTEGER DEFAULT 1,
             auto_approve_enabled INTEGER DEFAULT 0,