feature: Support addExtensions for validated-dto. (#839)

* Update ValidatedDTO.php

* Update ValidatedDTO.php

* refactor: rename addExtensions to extensions and update validator extension logic

* refactor: improve validator extension logic in ValidatedDTO

* refactor: replace extensions method with afterValidatorResolving for improved validator handling

---------

Co-authored-by: Deeka Wong <8337659+huangdijia@users.noreply.github.com>

Author: xuanyanwow

src/ValidatedDTO.php

@@ -19,6 +19,7 @@
 use Hyperf\Contract\ValidatorInterface;
 use Hyperf\Validation\Contract\ValidatorFactoryInterface;
 use Hyperf\Validation\ValidationException;
+use Hyperf\Validation\Validator;
 use InvalidArgumentException;
 
 abstract class ValidatedDTO extends SimpleDTO
@@ -61,6 +62,11 @@ protected function after(ValidatorInterface $validator): void
         // Do nothing
     }
 
+    protected function afterValidatorResolving(ValidatorInterface $validator): void
+    {
+        // Do nothing
+    }
+
     protected function scenes(): array
     {
         return [];
@@ -150,6 +156,8 @@ protected function isValidData(): bool
                 $this->attributes()
             );
 
+        $this->afterValidatorResolving($this->validator);
+
         $this->validator->after(fn ($validator) => $this->after($validator));
 
         return ! $this->validator->fails();
@@ -197,6 +205,8 @@ private function validationPasses(): bool
                 $this->attributes()
             );
 
+        $this->afterValidatorResolving($this->validator);
+
         $this->validator->after(fn (ValidatorInterface $validator) => $this->after($validator));
 
         return ! $this->validator->fails();