Add cache of match failures

[timrae]

This change introduces an sqlite database that contains the track_id, db insertion time, and ttl in the cache. The ttl starts with one week, and increases exponentially by a factor of 2 each time the same track_id is added to the database.

This significantly reduces the execution of the time script when there are a lot of match failures accumulating, which do not need to check every time.

[joshrmcdaniel]

LGTM besides the one comment