Stable releases previously required a byte-identical tree with the
promoted beta (only CHANGELOG.md could differ) and local releases had
to run exactly at the origin/main tip with an atomic main+tag push.
Together these froze main for the whole beta-to-stable window.
Relax both gates while keeping the beta soak mandatory:
- stable still requires an explicit delivered, non-withdrawn beta whose
commit is an ancestor of the sealed release commit; the tree-identity
drift check is removed
- local releases accept any clean sealed commit contained in
origin/main history (any branch or detached HEAD) and push only the
release tag; command-compatibility checks compare the sealed HEAD,
matching CI
ossutil 2.x signs requests with V4 and refuses to run without an
explicit region, so the OSS mirror sync would fail in CI even with
valid credentials. Derive OSS_REGION from the endpoint host
(including -internal variants) and fail fast when it cannot be
derived.