fix: restore executions limit cleanup behind a runtime env flag

Per review feedback on the PHPStan cleanup, the two `if
($executionsRetentionCount > 0 && ENABLE_EXECUTIONS_LIMIT_ON_ROUTE)`
blocks in `app/controllers/general.php` and
`src/Appwrite/Platform/Modules/Functions/Http/Executions/Create.php`
were load-bearing feature flags, not dead code. Removing them silently
dropped the ability to turn the cleanup on later.

Changes:

- Convert `ENABLE_EXECUTIONS_LIMIT_ON_ROUTE` from
  `const ... = false;` to a `define()` backed by the new
  `_APP_EXECUTIONS_LIMIT_ON_ROUTE` env var (defaults to `disabled`).
  PHPStan can no longer fold the `&&` away since the value is now
  runtime-resolved, so the guarded blocks are live again.
- Restore the `/* cleanup */` block in the `router()` helper in
  `app/controllers/general.php`.
- Restore the two cleanup blocks in `Functions/Http/Executions/Create.php`
  (one on the async-scheduled return path, one on the sync-response
  path), and re-add the `DeleteEvent $queueForDeletes` /
  `int $executionsRetentionCount` injections plus the
  `Appwrite\Event\Delete` import.

Runtime behavior is identical to main (flag off by default); operators
can now flip it via env without a code change.

app/controllers/general.php

@@ -771,6 +771,20 @@ function router(Http $utopia, Database $dbForPlatform, callable $getProjectDB, S
             deployment: $deployment->getArrayCopy(),
         ));
 
+        /* cleanup */
+        if ($executionsRetentionCount > 0 && ENABLE_EXECUTIONS_LIMIT_ON_ROUTE) {
+            $resourceType = $type === 'function'
+                ? RESOURCE_TYPE_FUNCTIONS
+                : RESOURCE_TYPE_SITES;
+
+            $queueForDeletes
+                ->setProject($project)
+                ->setResourceType($resourceType)
+                ->setResource($resource->getSequence())
+                ->setType(DELETE_TYPE_EXECUTIONS_LIMIT)
+                ->trigger();
+        }
+
         return true;
     } elseif ($type === 'api') {
         return false;

app/init/constants.php

@@ -1,6 +1,7 @@
 <?php
 
 use Appwrite\Platform\Modules\Compute\Specification;
+use Utopia\System\System;
 
 const APP_NAME = 'Appwrite';
 const APP_DOMAIN = 'appwrite.io';
@@ -190,7 +191,7 @@ const BUILD_TYPE_RETRY = 'retry';
 
 // Deletion Types
 
-const ENABLE_EXECUTIONS_LIMIT_ON_ROUTE = false;
+\define('ENABLE_EXECUTIONS_LIMIT_ON_ROUTE', System::getEnv('_APP_EXECUTIONS_LIMIT_ON_ROUTE', 'disabled') === 'enabled');
 
 const DELETE_TYPE_DATABASES = 'databases';
 const DELETE_TYPE_DOCUMENT = 'document';

src/Appwrite/Platform/Modules/Functions/Http/Executions/Create.php

@@ -3,6 +3,7 @@
 namespace Appwrite\Platform\Modules\Functions\Http\Executions;
 
 use Ahc\Jwt\JWT;
+use Appwrite\Event\Delete as DeleteEvent;
 use Appwrite\Event\Event;
 use Appwrite\Event\Func;
 use Appwrite\Extend\Exception;
@@ -100,6 +101,8 @@ class Create extends Base
             ->inject('executor')
             ->inject('platform')
             ->inject('authorization')
+            ->inject('queueForDeletes')
+            ->inject('executionsRetentionCount')
             ->callback($this->action(...));
     }
 
@@ -126,6 +129,8 @@ class Create extends Base
         Executor $executor,
         array $platform,
         Authorization $authorization,
+        DeleteEvent $queueForDeletes,
+        int $executionsRetentionCount,
     ) {
         $async = \strval($async) === 'true' || \strval($async) === '1';
 
@@ -331,6 +336,15 @@ class Create extends Base
                 $execution = $authorization->skip(fn () => $dbForProject->createDocument('executions', $execution));
             }
 
+            if ($executionsRetentionCount > 0 && ENABLE_EXECUTIONS_LIMIT_ON_ROUTE) {
+                $queueForDeletes
+                    ->setProject($project)
+                    ->setResource($function->getSequence())
+                    ->setResourceType(RESOURCE_TYPE_FUNCTIONS)
+                    ->setType(DELETE_TYPE_EXECUTIONS_LIMIT)
+                    ->trigger();
+            }
+
             $response->setStatusCode(Response::STATUS_CODE_ACCEPTED);
             $response->dynamic($execution, Response::MODEL_EXECUTION);
             return;
@@ -509,6 +523,15 @@ class Create extends Base
             }
         }
 
+        if ($executionsRetentionCount > 0 && ENABLE_EXECUTIONS_LIMIT_ON_ROUTE) {
+            $queueForDeletes
+                ->setProject($project)
+                ->setResource($function->getSequence())
+                ->setResourceType(RESOURCE_TYPE_FUNCTIONS)
+                ->setType(DELETE_TYPE_EXECUTIONS_LIMIT)
+                ->trigger();
+        }
+
         $response
             ->setStatusCode(Response::STATUS_CODE_CREATED)
             ->dynamic($execution, Response::MODEL_EXECUTION);