fix: preserve Reddit monitor lock refreshes

Author: chubes4

inc/Tracking/RedditCommentDomainStore.php

@@ -116,6 +116,9 @@ public static function refreshLock( string $token ): bool {
 			'token'      => $token,
 			'expires_at' => time() + ( 30 * MINUTE_IN_SECONDS ),
 		);
+		if ( $current === $replacement ) {
+			return true;
+		}
 		return self::replaceLock( $current, $replacement );
 	}
 

tests/Unit/Abilities/Reddit/RedditCommentDomainMonitorAbilityTest.php

@@ -213,6 +213,9 @@ public function test_lock_is_non_autoloaded_and_only_owner_can_release_it(): voi
 		$token = RedditCommentDomainStore::acquireLock();
 		$this->assertIsString( $token );
 		$this->assertWPError( RedditCommentDomainStore::acquireLock() );
+		$this->assertTrue( RedditCommentDomainStore::refreshLock( $token ) );
+		$this->assertTrue( RedditCommentDomainStore::refreshLock( $token ), 'A same-second owner refresh must remain idempotent.' );
+		$this->assertFalse( RedditCommentDomainStore::refreshLock( 'different-owner' ) );
 		RedditCommentDomainStore::releaseLock( 'different-owner' );
 		$this->assertWPError( RedditCommentDomainStore::acquireLock() );