- Add seq column assigned in call order to fix logs racing each other
as fire-and-forget writes (e.g. a snippet's "started" entry could be
saved after its "finished" entry)
- Log snippet start/finish/failure via context.runSnippet, matching
existing step start/pass/fail logging
- Rework Markdown log export to per-entry sections instead of a table
- Version bump: 1.10.0 -> 1.10.1