Improve crawler stats logging

[vdusek]

Maybe it is just a habit but I find the log quite bloated (compated to JS).

crawler stats

• spread over 10 lines which is quite lot since they are periodic
• Retry histogram (Which is really useful) is cut after few values unlike in JS
• Some of the keys of stats are also cut out
• There are no values for time units, I can guess some are in seconds, some per minute

Originally posted by @metalwarrior665 on Slack - https://apify.slack.com/archives/CD0SF6KD4/p1753007915099809.