Add helper itemMetadataLogString static func for logging in NextcloudFilesDatabaseManager

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

shell_integration/MacOSX/NextcloudIntegration/FileProviderExt/Database/NextcloudFilesDatabaseManager.swift

@@ -74,6 +74,10 @@ class NextcloudFilesDatabaseManager : NSObject {
         return realm
     }
 
+    private static func itemMetadataLogString(_ metadata: NextcloudItemMetadataTable) -> String {
+        return "ocID: \(metadata.ocId), etag: \(metadata.etag), fileName: \(metadata.fileName)"
+    }
+
     func anyItemMetadatasForAccount(_ account: String) -> Bool {
         return !ncDatabase().objects(NextcloudItemMetadataTable.self).filter("account == %@", account).isEmpty
     }