Merge branch '6.4' into 7.1

* 6.4:
  fix: ignore missing directory in isVendor()
  [OptionsResolver] Allow Union/Intersection Types in Resolved Closures
  Issue #58821: [DependencyInjection] Support interfaces in ContainerBuilder::getReflectionClass().
  Dynamically fix compatibility with doctrine/data-fixtures v2
  [HttpKernel] Ensure HttpCache::getTraceKey() does not throw exception
  don't call EntityManager::initializeObject() with scalar values
  [Validator] review italian translations
  Update PR template

Author: nicolas-grekas

Validator/Constraints/UniqueEntityValidator.php

@@ -105,7 +105,7 @@ public function validate(mixed $value, Constraint $constraint): void
 
             $criteria[$fieldName] = $fieldValue;
 
-            if (null !== $criteria[$fieldName] && $class->hasAssociation($fieldName)) {
+            if (\is_object($criteria[$fieldName]) && $class->hasAssociation($fieldName)) {
                 /* Ensure the Proxy is initialized before using reflection to
                  * read its identifiers. This is necessary because the wrapped
                  * getter methods in the Proxy are being bypassed.

composer.json

@@ -44,7 +44,7 @@
         "symfony/validator": "^6.4|^7.0",
         "symfony/var-dumper": "^6.4|^7.0",
         "doctrine/collections": "^1.0|^2.0",
-        "doctrine/data-fixtures": "^1.1",
+        "doctrine/data-fixtures": "^1.1|^2",
         "doctrine/dbal": "^3.6|^4",
         "doctrine/orm": "^2.15|^3",
         "psr/log": "^1|^2|^3"