The reader asked for `version` and `bootstrapped`. #61 specifies `schema`,
`bootstrapped_by`/`bootstrapped_at` and `converged_by`/`converged_at` — so
no writer would ever have produced the keys being read, and the day #61
landed this command would have rendered 'unknown' with the timestamp
omitted, forever, with nothing to say why.
Keyed to #61's spelling, with fixtures carrying that schema verbatim so
the contract is pinned rather than assumed. Birth and latest are reported
separately and neither is inferred from the other: under #61 rule 2
converged_* is written only when the version differs, so its absence is a
legitimate state on a freshly bootstrapped box, printed 'not recorded'
rather than backfilled from birth. A manifest whose schema this rig does
not know is named as such instead of being half-read in silence.
Found in review of #74.
Refs #64
91a8905a71