Log query endpoint queries

[mattnibs]

Log query endpoint queries at debug level.

[philrz]

Looking good on the branch! 👍

$ zed query 'count()'
{count:31(uint64)}

$ zed serve -lake lake -log.level debug
...
{"level":"debug","ts":1676572886.532803,"logger":"core","msg":"Running Query","request_id":"2LpfLBi4BAeuzbdCKANtzrRA54H","query":"count()"}