log file rotation

[dnlbauer]

Hi,

I think it would be beneficial to split the utt.log in chunks i.e. on a yearly basis like this: utt-2024.log, utt-2025.log, .... I see several benefits for this:

• The log file does not grow forever
• Old logs can be easily cleaned/archived/discarded
• Its easier to deal with log files when using utt edit.

As far as I understand, the tooling already defaults to the most recent month/year, so none of the tools except utt report with --from needs access to more than one year of data, and all other tooling could have a flag added to work on different years.