refactor(databases): streamline backup queries to use team context

- Updated backup retrieval logic in DatabasesController to utilize the new ownedByCurrentTeam method for improved access control.
- Enhanced code readability and maintainability by centralizing team-based filtering in the ScheduledDatabaseBackup model.

app/Models/ScheduledDatabaseBackup.php

@@ -10,6 +10,11 @@ class ScheduledDatabaseBackup extends BaseModel
 {
     protected $guarded = [];
 
+    public static function ownedByCurrentTeam()
+    {
+        return ScheduledDatabaseBackup::whereRelation('team', 'id', currentTeam()->id)->orderBy('name');
+    }
+
     public function team()
     {
         return $this->belongsTo(Team::class);