Fix alert summarizing blocks viewing alerts with "Please enter a number that is no more than 4294967295." when there are more the alert_id > 2^32
This update runs the following schema change, which may take time.
SQL:
alter table xf_sv_user_alert_summary modify column alert_id bigint not null;
Fix xf_sv_user_alert_summary entries did not get cleaned up when alerts expired
Fix AlertTotalRebuild job could cause deadlocks or lock wait timeouts
