improve shutdown routine

app/lib/features/quotes/data/providers.dart

@@ -25,7 +25,7 @@ import 'package:flutter/services.dart' show rootBundle;
 import 'package:path/path.dart' as p;
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 import 'package:sqlite3_flutter_libs/sqlite3_flutter_libs.dart';
-
+import 'package:weblibre/core/database_registry.dart';
 import 'package:weblibre/core/filesystem.dart';
 import 'package:weblibre/features/quotes/data/database/database.dart';
 
@@ -59,6 +59,8 @@ QuotesDatabase quotesDatabase(Ref ref) {
     }),
   );
 
+  DatabaseRegistry.instance.register('quotes', db);
+
   ref.onDispose(() async {
     await db.close();
   });

app/lib/features/quotes/data/providers.g.dart

@@ -48,4 +48,4 @@ final class QuotesDatabaseProvider
   }
 }
 
-String _$quotesDatabaseHash() => r'e5a15556bef876f3a4941957f01bc1457a12a956';
+String _$quotesDatabaseHash() => r'be623fb69eb03f4c264d1a4fd07300fa669ecc86';