fix: delete-days not applied when banning

for slash too

Author: marawny

backend/src/plugins/ModActions/commands/ban/BanSlashCmd.ts

@@ -95,6 +95,7 @@ export const BanSlashCmd = modActionsSlashCmd({
       interaction.member as GuildMember,
       mod,
       contactMethods,
+      options["delete-days"] ?? undefined,
     );
   },
 });