Implement initialization migration to binds error handling

lib/logic/api_maps/graphql_maps/server_api/volume_api.dart

@@ -1,5 +1,15 @@
 part of 'server.dart';
 
+class MigrateToBindsMutationReturn extends GenericMutationResult {
+  MigrateToBindsMutationReturn({
+    required final super.success,
+    required final super.code,
+    final super.message,
+    this.jobUid,
+  });
+  final String? jobUid;
+}
+
 mixin VolumeApi on ApiMap {
   Future<List<ServerDiskVolume>> getServerDiskVolumes() async {
     QueryResult response;
@@ -57,10 +67,11 @@ mixin VolumeApi on ApiMap {
     }
   }
 
-  Future<String?> migrateToBinds(
+  Future<MigrateToBindsMutationReturn> migrateToBinds(
     final Map<String, String> serviceToDisk,
   ) async {
-    String? jobUid;
+    MigrateToBindsMutationReturn? mutation;
+
     try {
       final GraphQLClient client = await getClient();
       final input = Input$MigrateToBindsInput(
@@ -77,12 +88,22 @@ mixin VolumeApi on ApiMap {
           await client.mutate$MigrateToBinds(
         migrateMutation,
       );
-
-      jobUid = result.parsedData!.migrateToBinds.job!.uid;
+      mutation = mutation = MigrateToBindsMutationReturn(
+        success: result.parsedData!.migrateToBinds.success,
+        code: result.parsedData!.migrateToBinds.code,
+        message: result.parsedData!.migrateToBinds.message,
+        jobUid: result.parsedData!.migrateToBinds.job?.uid,
+      );
     } catch (e) {
       print(e);
+      mutation = MigrateToBindsMutationReturn(
+        success: false,
+        code: 0,
+        message: e.toString(),
+        jobUid: null,
+      );
     }
 
-    return jobUid;
+    return mutation;
   }
 }

lib/logic/cubit/server_jobs/server_jobs_cubit.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 
+import 'package:selfprivacy/config/get_it_config.dart';
 import 'package:selfprivacy/logic/api_maps/graphql_maps/server_api/server.dart';
 import 'package:selfprivacy/logic/cubit/app_config_dependent/authentication_dependend_cubit.dart';
 import 'package:selfprivacy/logic/models/json/server_job.dart';
@@ -44,10 +45,15 @@ class ServerJobsCubit
   }
 
   Future<void> migrateToBinds(final Map<String, String> serviceToDisk) async {
-    final String? jobUid = await api.migrateToBinds(serviceToDisk);
+    final result = await api.migrateToBinds(serviceToDisk);
+    if (!result.success || result.jobUid == null) {
+      getIt<NavigationService>().showSnackBar(result.message!);
+      return;
+    }
+
     emit(
       ServerJobsState(
-        migrationJobUid: jobUid,
+        migrationJobUid: result.jobUid,
       ),
     );
   }