Fix new-account creation failing under MariaDB strict mode

accounts.lastlogin/logtime had no defaults and were NOT NULL, but the
auto-create-account INSERT never set them, so new accounts failed
under MariaDB strict mode (silently accepted under the old MySQL
5.0 target). Insert explicit empty/zero values and give lastlogin a
default; also widen it to varchar(32) to match the runtime.sql fix
already applied to the starttime column.

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

database sql files/accounts.sql

@@ -41,7 +41,7 @@ CREATE TABLE IF NOT EXISTS `accounts` (
   `isSiteLogged` tinyint(1) default '0',
   `ktpoints` int(11) NOT NULL default '0',
   `newpoints` int(11) NOT NULL default '0',
-  `lastlogin` varchar(20) NOT NULL,
+  `lastlogin` varchar(32) NOT NULL default '',
   `logtime` int(11) NOT NULL,
   `totlogtime` int(11) NOT NULL default '0',
   PRIMARY KEY  (`id`)