Bug tracker searches are generally pretty poor, even if your team never migrated from one to another. During a 3 AM outage, I need to grep git log for affected

Bug tracker searches are generally pretty poor, even if your team never migrated from one to another. During a 3 AM outage, I need to grep git log for affected files to find likely root causes from 2018 or whatever. I want reviewers to insist on a commit message that says what’s going on here and why. Not a full design doc, but enough to narrow down which commits are related to something. Please don’t make me open a hundred bug tracker pages that may or may not still exist.