Give Egglog team data re: search_rules taking forever, rules that we find

[ninehusky]

See title. Yihong mentioned that our flamegraph "seemed sus", and it's not immediately clear from the flamegraph what is going on (especially because our queries are so simple). Maybe it's just that rules are matching on everything?

Either way: the debugging should be relatively straightforward. Let's make the logs more valuable (#50), and as part of the logs, dump the output of (print-stats); we can start by putting (print-stats) after every call of (run-rewrites). We should also output the rules that we find (should be easy).