feat(users): add native VIP management

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/Core/DBMigrator.php

@@ -11,9 +11,10 @@ class DBMigrator {
     use DBMigratorPart2;
     use DBMigratorPart3;
     use DBMigratorIdentity;
+    use DBMigratorVip;
 
     /** Current schema version; changing it re-runs dbDelta. */
-    const SCHEMA_VERSION = '1.20.0';
+    const SCHEMA_VERSION = '1.21.0';
 
     const OPT_KEY = 'aksrt_db_schema_version';