fix PdoTrait PHPDocs

core/lib/Drupal/Core/Database/Statement/PdoTrait.php

@@ -9,6 +9,15 @@
  */
 trait PdoTrait {
 
+  /**
+   * Converts a FetchAs mode to a \PDO::FETCH_* constant value.
+   *
+   * @param \Drupal\Core\Database\FetchAs $mode
+   *   The FetchAs mode.
+   *
+   * @return int
+   *   A \PDO::FETCH_* constant value.
+   */
   protected function fetchAsToPdo(FetchAs $mode): int {
     return match ($mode) {
       FetchAs::Associative => \PDO::FETCH_ASSOC,
@@ -19,6 +28,15 @@ protected function fetchAsToPdo(FetchAs $mode): int {
     };
   }
 
+  /**
+   * Converts a \PDO::FETCH_* constant value to a FetchAs mode.
+   *
+   * @param int $mode
+   *   The \PDO::FETCH_* constant value.
+   *
+   * @return \Drupal\Core\Database\FetchAs
+   *   A FetchAs mode.
+   */
   protected function pdoToFetchAs(int $mode): FetchAs {
     return match ($mode) {
       \PDO::FETCH_ASSOC => FetchAs::Associative,
@@ -170,7 +188,7 @@ protected function clientFetchObject(?string $class = NULL, array $constructorAr
    * @return array<array<scalar|null>|object|scalar|null>
    *   An array of results.
    */
-  // phpcs:ignore Drupal.Commenting.FunctionComment.InvalidReturn
+  // phpcs:ignore Drupal.Commenting.FunctionComment.InvalidReturn, Drupal.Commenting.FunctionComment.Missing
   protected function clientFetchAll(?FetchAs $mode = NULL, int|string|null $columnOrClass = NULL, array|null $constructorArguments = NULL): array {
     return match ($mode) {
       FetchAs::Column => $this->getClientStatement()->fetchAll(