Add scheduled tariff synchronization and bulk update functionality

- Introduced `runScheduledSyncTariffs` function to handle tariff synchronization independently from VPS and payment sync.
- Updated `syncFromBillmanager` to accept options for skipping tariff and VPS payment syncs.
- Added new database columns for `syncTariffsIntervalMinutes` and `customFields` in settings.
- Enhanced settings page to configure tariff sync interval.
- Implemented bulk update functionality for VPS status and deletion in the VPS management page.
- Updated various components to support new features, including sync log display and improved payment handling.

server/db/schema.js

@@ -100,7 +100,9 @@ CREATE TABLE IF NOT EXISTS settings (
   autoConvert INTEGER,
   ratesUpdatedAt TEXT,
   syncEnabled INTEGER,
-  syncIntervalMinutes INTEGER
+  syncIntervalMinutes INTEGER,
+  syncTariffsIntervalMinutes INTEGER,
+  customFields TEXT
 );
 
 CREATE TABLE IF NOT EXISTS sync_log (