Add admin ckey to known alts panel (#62761)

About The Pull Request

Adds the admin who added the known alt to the known alts panel.
Changelog

cl
admin: The admin who adds a known alt is now logged in the table.
/cl

SQL/tgstation_schema_prefixed.sql

@@ -672,6 +672,7 @@ CREATE TABLE `SS13_known_alts` (
     `id` INT NOT NULL AUTO_INCREMENT,
     `ckey1` VARCHAR(32) NOT NULL,
     `ckey2` VARCHAR(32) NOT NULL,
+    `admin_ckey` VARCHAR(32) NOT NULL DEFAULT '*no key*',
     PRIMARY KEY (`id`),
     UNIQUE INDEX `unique_contraints` (`ckey1` , `ckey2`)
 );