fix: rename $class param to $class_name + ignore UnfinishedPrepare + ruleset cleanup

- autoloader.php load() + migration-runner.php class_to_file(): rename $class
  parameter to $class_name to satisfy
  Universal.NamingConventions.NoReservedKeywordParameterNames.classFound
- dosing-repository.php line 81: add phpcs:ignore UnfinishedPrepare on
  $wpdb->prepare() — {} is a builder-constructed safe value,
  not an unfinished placeholder
- phpcs.xml.dist: remove incorrect rule names (WordPress.WP.ReservedKeyword.class,
  WordPress.DB.PreparedSQLPlaceholders.ReplacementsFound); fix excluded names to
  match actual sniff IDs from CI logs

Agent-Session: claude-adopt-ci-20260616

includes/class-pr-core-autoloader.php

@@ -57,16 +57,16 @@ class PR_Core_Autoloader {
 	/**
 	 * Autoload callback. Only handles PR_Core_ prefixed classes.
 	 *
-	 * @param string $class Fully-qualified class name.
+	 * @param string $class_name Fully-qualified class name.
 	 * @return void
 	 */
-	public static function load( string $class ): void {
-		if ( 0 !== strpos( $class, 'PR_Core_' ) ) {
+	public static function load( string $class_name ): void {
+		if ( 0 !== strpos( $class_name, 'PR_Core_' ) ) {
 			return;
 		}
 
 		// PR_Core_Foo_Bar => foo-bar => class-pr-core-foo-bar.php.
-		$suffix   = substr( $class, 8 ); // Strip 'PR_Core_'.
+		$suffix   = substr( $class_name, 8 ); // Strip 'PR_Core_'.
 		$filename = 'class-pr-core-' . str_replace( '_', '-', strtolower( $suffix ) ) . '.php';
 
 		foreach ( self::$dirs as $dir ) {