In the early days of KIST, having that line was SO useful. I propose we put it in the summary line (if we can or in a new type of summary line) like this one:
[notice] Tor 0.3.4.0-alpha-dev (git-facde43b0e0ad3ea) running on Linux with Libevent 2.1.8-stable, OpenSSL 1.0.2n, Zlib 1.2.11, Liblzma 5.2.2, and Libzstd N/A.
Trac: Keywords: N/Adeleted, easy added Type: enhancement to defect
FWIW, I gave 5 minutes of effort to adding the scheduler type to the summary. It not as easy as log_info because the required stuff (get_scheduler_type_string() and the_scheduler) is static. Furthermore (and actually importantly), I don't think we've initialized the scheduler at the point the summary is logged.
Working off the assumption that we don't want to overcome these challenges, I'm moving this to needs_review.