test(release-lines): enforce semantic parity

[zoeyrose]

Summary

• add a deterministic local --other-root audit for the shared parity ledger
• enforce exact terminal suffix length, ordinal order, PR binding, and changed-path sets
• compare the full tracked-tree delta in both directions and reject unclassified or stale exceptions
• prove exact outcomes by stable patch ID, catalog identity/reference parity, and order-insensitive authored ADS semantics

Release-line relationship

This is the 1.x companion for #139 and terminal ordinal 2. After both ordinal-1 squashes were audited and durably recorded, its unchanged reviewed result tree was rebuilt as one commit whose sole parent is the observed #182 squash.

• exact base / parent: 25bc88fa43d529d8c9fec568772632b6dccb800a
• remote head: 6360d5be285caba2d708e1448e1f3f656d5aa909
• result tree: 30e4ef7218c97b8bcd4d11f8a8e76820234bda48
• changed paths: exactly the three declared 1.x ordinal-2 paths

Validation

• python3 -m unittest -v tools.tests.test_release_line_parity (21 tests)
• cross-line semantic components: 43/43 classified tree differences, two authored order-only equivalences, 8,105/8,105 definitions with zero identity differences, one classified reference difference, seven exact patch outcomes
• full 1.x aggregate validation passes (155 tests plus audits and package checks)
• all four fresh GitHub checks pass on the exact reconciled head
• exact declared-suffix candidate audit passes
• git diff --check
• independent final-tree reviews found zero actionable findings; the reconciled head changes ancestry only and preserves that exact reviewed tree

Terminal protocol

Both ordinal-1 PRs are merged, exact, and durably recorded. This is the next authorized terminal merge. Squash-merge #184 before #185; after merge, re-query both tips and record the actual squash SHA before rebuilding or enabling #185.

Refs #139
Refs #137
Refs #113
Refs #154

[github-actions]

🎉 This PR is included in version 1.8.18 🎉

The release is available on:

• v1.8.18
• GitHub release

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