docs: fix phpstan errors on TestLogger

phpstan-baseline.php

@@ -3491,21 +3491,6 @@
 	'count' => 1,
 	'path' => __DIR__ . '/system/Test/PhpStreamWrapper.php',
 ];
-$ignoreErrors[] = [
-	'message' => '#^Method CodeIgniter\\\\Test\\\\TestLogger\\:\\:cleanup\\(\\) has no return type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/system/Test/TestLogger.php',
-];
-$ignoreErrors[] = [
-	'message' => '#^Parameter \\#1 \\$level \\(string\\) of method CodeIgniter\\\\Test\\\\TestLogger\\:\\:log\\(\\) should be contravariant with parameter \\$level \\(mixed\\) of method Psr\\\\Log\\\\LoggerInterface\\:\\:log\\(\\)$#',
-	'count' => 1,
-	'path' => __DIR__ . '/system/Test/TestLogger.php',
-];
-$ignoreErrors[] = [
-	'message' => '#^Property CodeIgniter\\\\Test\\\\TestLogger\\:\\:\\$op_logs has no type specified\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/system/Test/TestLogger.php',
-];
 $ignoreErrors[] = [
 	'message' => '#^Method CodeIgniter\\\\Test\\\\TestResponse\\:\\:__call\\(\\) should return mixed but return statement is missing\\.$#',
 	'count' => 1,

system/Test/TestLogger.php

@@ -18,13 +18,16 @@
  */
 class TestLogger extends Logger
 {
+    /**
+     * @var list<array{level: mixed, message: string, file: string|null}>
+     */
     protected static $op_logs = [];
 
     /**
      * The log method is overridden so that we can store log history during
      * the tests to allow us to check ->assertLogged() methods.
      *
-     * @param string $level
+     * @param mixed  $level
      * @param string $message
      */
     public function log($level, $message, array $context = []): bool
@@ -92,6 +95,8 @@ public static function didLog(string $level, $message, bool $useExactComparison
      *
      * @param string $file
      *
+     * @return string
+     *
      * @deprecated No longer needed as underlying protected method is also deprecated.
      */
     public function cleanup($file)