chore: Add the generated code and migrations that were gitignored (#102)

test/serverpod_offline_sync_test_client/lib/migrations/migration_registry.dart

@@ -0,0 +1,19 @@
+/// AUTOGENERATED BY SERVERPOD create-migration - DO NOT EDIT BY HAND
+/// Merging: resolve registry conflicts the same as migration_registry.txt.
+library;
+
+import 'package:serverpod_database/serverpod_database.dart';
+
+part '20260703114649226/migration.dart';
+
+/// Migration registry for the client-side database.
+class MigrationRegistry {
+  /// Ordered list of all client-side database migrations.
+  /// New migrations are always appended at the end.
+  static final List<MigrationVersionSql> migrations = [
+    _Migration20260703114649226(),
+  ];
+
+  /// List of all client-side database migration versions.
+  static List<String> get versions => migrations.map((m) => m.version).toList();
+}