test: add test for fetched_at logic (William Casarin)

record when a profile was last fetched (William Casarin)

stats: add reaction counter (William Casarin)

update generated bindings for note metadata (William Casarin)

update metadata schema (William Casarin)

txn: refactor nostrdb to use ndb_txn in more places internally (William Casarin)

testdata: add japanese profile (William Casarin)

test: update replacement test (William Casarin)

pushed to nostrdb:refs/heads/master

http://git.jb55.com/nostrdb/commit/25e0a9f2d3e98ccbbafb53504599f57a20fcb0b1.html