fix: use path only for JsonCacheInfoRepository

JsonCacheInfoRepository assertion requires either path OR databaseName, not both.
Using path only to ensure database is stored in persistent directory.

lib/services/cover_cache_manager.dart

@@ -51,8 +51,8 @@ class CoverCacheManager {
           _cacheKey,
           stalePeriod: _maxCacheAge,
           maxNrOfCacheObjects: _maxCacheObjects,
-          // Store database in the same persistent directory
-          repo: JsonCacheInfoRepository(databaseName: _cacheKey, path: _cachePath),
+          // Use path only (not databaseName) to store database in persistent directory
+          repo: JsonCacheInfoRepository(path: _cachePath),
           fileSystem: IOFileSystem(_cachePath!),
           fileService: HttpFileService(),
         ),