A workout's payload is JSON naming its activity, times, name, notes and
totals; a series is cut into chunks of at most 10 minutes, each its
times and columns as differences from the value before, gzipped before
it is sealed (ten minutes of positions at a fix a second take a few KB).
A payload of a newer schema, an unknown activity or kind, or a blank one
is skipped, never read half.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
