fix(psr4): ship php_cs_finder.php in the default ignore list

qaConfig/php_cs_finder.php is the documented CS Fixer Finder override
(docs/coding-standards.md tells projects to copy it into qaConfig/), yet
the shipped psr4-validate ignore list exempted only phparkitect.php and
php_cs.php - so any project following that doc failed the PSR-4 gate with
a false "Parse Error" on the classless finder file. Surfaced by
ballicom-zoho's full pipeline run on 2026-08-28.

TDD: the projectQaConfig fixture gains a php_cs_finder.php, which turns
testShippedDefaultIgnoreListExcludesQaConfigConfigFiles red on the old
list; the new ignore entry makes it green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: LTSCommerce

configDefaults/generic/psr4-validate-ignore-list.txt

@@ -3,3 +3,4 @@
 #tests/Asset#
 #qaConfig/phparkitect\.php#
 #qaConfig/php_cs\.php#
+#qaConfig/php_cs_finder\.php#

tests/Small/Psr4ValidatorTest.php

@@ -114,10 +114,12 @@ public function testItFindsErrorsAndThrowsAnExceptionOnAnInvalidProject(): void
     /**
      * Regression: php-qa-ci's own convention maps `qaConfig/` as a PSR-4 root
      * (QaConfig\, for custom PHPStan rules) AND ships non-class config files
-     * there that projects override — qaConfig/phparkitect.php and
-     * qaConfig/php_cs.php. Those legitimately have no namespace, so the SHIPPED
-     * default ignore list must exclude them; otherwise the re-enabled PSR-4
-     * gate falsely reports them as Parse Errors on every consuming project.
+     * there that projects override — qaConfig/phparkitect.php,
+     * qaConfig/php_cs.php and qaConfig/php_cs_finder.php (the documented CS
+     * Fixer Finder override, docs/coding-standards.md). Those legitimately
+     * have no namespace, so the SHIPPED default ignore list must exclude them;
+     * otherwise the re-enabled PSR-4 gate falsely reports them as Parse Errors
+     * on every consuming project.
      *
      * The fixture also contains a correctly-namespaced rule class under the
      * same root (qaConfig/PHPStan/Rules/GoodRule.php) to prove the exclusion is

tests/assets/psr4/projectQaConfig/qaConfig/php_cs_finder.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Fixture mirroring a real project's qaConfig/php_cs_finder.php override (the
+ * documented CS Fixer Finder override — see docs/coding-standards.md): another
+ * non-class config file with NO namespace under the `QaConfig\` PSR-4 root.
+ */
+
+return ['fixture' => true];