refactor(policies): add uploadBackup ability and enforce it on backup upload endpoint

Introduce a dedicated `uploadBackup` ability on Application, Database,
Service, and ServiceDatabase policies (admin/owner only) and call
`$this->authorize('uploadBackup', $resource)` in `UploadController::upload`
so the backup-upload endpoint goes through the same policy layer as the
rest of the authorization refactor. Adds Pest coverage for each policy
variant plus HTTP-level checks.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/Http/Controllers/UploadController.php

@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers;
 
+use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
 use Illuminate\Http\Request;
 use Illuminate\Http\UploadedFile;
 use Illuminate\Routing\Controller as BaseController;
@@ -11,6 +12,8 @@ use Pion\Laravel\ChunkUpload\Receiver\FileReceiver;
 
 class UploadController extends BaseController
 {
+    use AuthorizesRequests;
+
     public function upload(Request $request)
     {
         $databaseIdentifier = request()->route('databaseUuid');
@@ -18,6 +21,9 @@ class UploadController extends BaseController
         if (is_null($resource)) {
             return response()->json(['error' => 'You do not have permission for this database'], 500);
         }
+
+        $this->authorize('uploadBackup', $resource);
+
         $receiver = new FileReceiver('file', $request, HandlerFactory::classFromRequest($request));
 
         if ($receiver->isUploaded() === false) {

app/Policies/ApplicationPolicy.php

@@ -78,6 +78,24 @@ class ApplicationPolicy
         return false;
     }
 
+    /**
+     * Determine whether the user can upload a backup archive for this application.
+     */
+    public function uploadBackup(User $user, Application $application): Response
+    {
+        $teamId = $this->getTeamId($application);
+
+        if ($teamId === null) {
+            return Response::deny('Application team not found.');
+        }
+
+        if ($user->isAdminOfTeam($teamId)) {
+            return Response::allow();
+        }
+
+        return Response::deny('You need at least admin or owner permissions to upload backups for this application.');
+    }
+
     /**
      * Determine whether the user can deploy the application.
      */

app/Policies/DatabasePolicy.php

@@ -87,6 +87,24 @@ class DatabasePolicy
         return $teamId !== null && $user->isAdminOfTeam($teamId);
     }
 
+    /**
+     * Determine whether the user can upload a backup archive for this database.
+     */
+    public function uploadBackup(User $user, $database): Response
+    {
+        $teamId = $this->getTeamId($database);
+
+        if ($teamId === null) {
+            return Response::deny('Database team not found.');
+        }
+
+        if ($user->isAdminOfTeam($teamId)) {
+            return Response::allow();
+        }
+
+        return Response::deny('You need at least admin or owner permissions to upload backups for this database.');
+    }
+
     /**
      * Determine whether the user can manage database backups.
      */

app/Policies/ServiceDatabasePolicy.php

@@ -63,4 +63,12 @@ class ServiceDatabasePolicy
     {
         return Gate::allows('update', $serviceDatabase->service);
     }
+
+    /**
+     * Determine whether the user can upload a backup archive for this service database.
+     */
+    public function uploadBackup(User $user, ServiceDatabase $serviceDatabase): bool
+    {
+        return Gate::allows('uploadBackup', $serviceDatabase->service);
+    }
 }

app/Policies/ServicePolicy.php

@@ -89,6 +89,16 @@ class ServicePolicy
         return $teamId !== null && $user->isAdminOfTeam($teamId);
     }
 
+    /**
+     * Determine whether the user can upload a backup archive for a database within this service.
+     */
+    public function uploadBackup(User $user, Service $service): bool
+    {
+        $teamId = $this->getTeamId($service);
+
+        return $teamId !== null && $user->isAdminOfTeam($teamId);
+    }
+
     /**
      * Determine whether the user can deploy the service.
      */