Per spec: the sequence number is a per-day counter that resets on
date change and starts at 0, not 1. The first release of a day is
quant_YYYYMMDD.0.hash, the second .1, etc.
Previous commit fixed *counting* today's releases via the Gitea API
(instead of the always-empty local git tags from a shallow checkout),
but still added +1 on top, which would have produced 1, 2, 3... for
the first, second, third releases of a day instead of 0, 1, 2.
DEPLOY_COUNT is now just RELEASES_TODAY directly.
kjh2064
71507374ca