There is a wiki and posts about code releases here: List of games with their current code number Wiki
Old links die, because Stern removes older downloads when new ones appear (for some reason), but all code updates from any company these days comes with a detailed change log…one that includes the changes in each and every previous update.
Read the change logs that already exist. It’s not clear to me that there is some easier/better solution than that (unless what you’re asking for is to be told how to change your strategy based on the updates).
You can sign up for code update notifications from Stern and you will get an email anytime something new drops. Read the log they send you.