* fix transaction rollbacks in DoTx * better assertion * Update internal/db/read_writer_test.go Co-authored-by: Michael Gaffney <mgaffney@users.noreply.github.com> Co-authored-by: Jim Lambert <jimlambrt@Jims-MBP-3.home> Co-authored-by: Michael Gaffney <mgaffney@users.noreply.github.com>