feat(backup): enhance backup job with S3 upload handling and notifications

- Introduced a new notification class, BackupSuccessWithS3Warning, to alert users when local backups succeed but S3 uploads fail.
- Updated DatabaseBackupJob to track local backup success and handle S3 upload errors, improving error reporting and user notifications.
- Modified ScheduledDatabaseBackupExecution model to include a new s3_uploaded boolean field for tracking S3 upload status.
- Adjusted views and validation logic to reflect changes in backup execution status and S3 handling.
- Added tests to ensure the new s3_uploaded column is correctly implemented and validated.

app/Models/ScheduledDatabaseBackupExecution.php

@@ -8,6 +8,15 @@ class ScheduledDatabaseBackupExecution extends BaseModel
 {
     protected $guarded = [];
 
+    protected function casts(): array
+    {
+        return [
+            's3_uploaded' => 'boolean',
+            'local_storage_deleted' => 'boolean',
+            's3_storage_deleted' => 'boolean',
+        ];
+    }
+
     public function scheduledDatabaseBackup(): BelongsTo
     {
         return $this->belongsTo(ScheduledDatabaseBackup::class);