Rewrite run and update_data comments
Rewrite run and update_data comments

Rewrite the comments describing `run` and `update_data` methods. This is to reflect the change we have just made allowing FETCHER_BOT_ENV to control whether or not reporting happens, but also mentioning "final run report" since we plan to introduce during-the-run progress reporting.

openc/openc_bot,openc/openc_bot