Allow passing enum to Database attribute (#56688)

Author: jnoordsij

src/Illuminate/Container/Attributes/Database.php

@@ -5,14 +5,15 @@
 use Attribute;
 use Illuminate\Contracts\Container\Container;
 use Illuminate\Contracts\Container\ContextualAttribute;
+use UnitEnum;
 
 #[Attribute(Attribute::TARGET_PARAMETER)]
 class Database implements ContextualAttribute
 {
     /**
      * Create a new class instance.
      */
-    public function __construct(public ?string $connection = null)
+    public function __construct(public UnitEnum|string|null $connection = null)
     {
     }