Add MySQL connection retry with timeout

Update gmodx to latest to fix an issue with lua part filling up the

stack

Rewrote the mysql rust part

Update gmod crate to latest

"cargo update"

Update dependencies: upgrade tokio to 1.47.1, and tokio-util to 0.7.16

Fix DOWN not working for the failed UP

#major Change { sync = true } option to still call the callback but m…

…ake it sync process, this is a breaking change

Enable foreign key constraints in SQLite

Handle NULL values in UpsertQuery functions for MySQL and SQLite