refactor(aot): update object extension method lookup logic

- Modified findObjectExtensionMethod to clarify that static lookup is only used
  for named MethodCall AST paths
- Added distinction between static method name resolution and dynamic method
  calls
- Updated documentation to explain that real methods are resolved before
  extension fallback
- Clarified that __call() magic method is only used when no valid extension exists
- Added test coverage for missing method calls using __call magic method
- Included dynamic method name handling in test assertions

src/UniversalMethodCall.php

@@ -413,9 +413,11 @@ trait UniversalMethodCall
     }
 
     /**
-     * Look up an object extension in the object's own namespace. Functions use
-     * {Class}_{snake_case_method} or {Class}_{lowerCamelCaseMethod}, and their
-     * first parameter must be exactly the extended class.
+     * Look up a statically compiled object extension in the object's own
+     * namespace. This lookup is only used by the named MethodCall AST path;
+     * dynamic method names and StaticCall nodes deliberately do not use it.
+     * Real methods are resolved before this fallback, while __call() is used
+     * only if no valid extension exists.
      */
     protected function findObjectExtensionMethod(string $class, string $method): ?array
     {

tests/aot/universal_method/object_extension.phpt

@@ -16,6 +16,11 @@ namespace App {
         {
             return 'real method';
         }
+
+        public function __call(string $method, array $args): string
+        {
+            return 'magic:' . $method;
+        }
     }
 
     function User_test_method(User $user, string $suffix): string
@@ -54,6 +59,11 @@ namespace {
         var_dump($user->formatName());
         var_dump($user->existing());
         var_dump((new \App\User('bob'))->displayName());
+        var_dump($user->missingMethod());
+
+        // Dynamic method names do not participate in static extension lookup.
+        $dynamicMethod = 'displayName';
+        var_dump($user->$dynamicMethod());
     }
 }
 ?>
@@ -63,3 +73,5 @@ string(11) "ALICE:camel"
 string(7) "[alice]"
 string(11) "real method"
 string(9) "BOB:camel"
+string(19) "magic:missingMethod"
+string(17) "magic:displayName"