[network-health] Re: Possibly invalid "First seen" metadata in metrics.torproject.org

I used the Advanced Search box on Tor Metrics to look for all running bridges with a start day between 9999 and 30000 days ago (the epoch was 20556 days ago). The webpage complained about the size of the result set, and handed back the first 2000. So, there are a lot of bridges in the "First Seen == epoch" state. (The tool wouldn't allow a starting value > 9999, so I had to use that. 9999 days is > 27 years, so there's certainly no bridge with a real First Seen date from over 27 years ago.)