Rebased onto dev after PR 1475 (cl/hexclave-pr1) was squash-merged.
Squashes the original 46-commit branch (including PR1-duplicate commits
that arrived via cherry-picks/merges) into a single commit containing
only PR2's net delta over dev.
Original PR 1481 head: 94872de407873a1cabd4085deb21b69afe8d7699
(kept locally at backup/cl-romantic-mendel-5a2c25-pre-rebase)
DB migration compat / Back-compat — Current branch migrations with ${{ needs.check-migrations-changed.outputs.base_branch }} branch code (push) Has been cancelled
DB migration compat / Forward-compat — Current branch code with ${{ needs.check-migrations-changed.outputs.base_branch }} branch migrations (push) Has been cancelled