feat(catalog-v2): version-anchored license links

[johnyeocx]

Summary

• Parent plan_license rows stay on the child version they point at. Child mint/promote no longer auto-repoints; follow is propagate.license_parents, and an explicit licenses[].version_slug is the only declared move.
• Child all_versions follow applies each parent version from the child sibling it is actually anchored to (content only — no relink). version_slug can pin a specific parent version.
• Dashboard: Go to License opens the anchored child version, the child card shows the slug badge, and Save plan changes → Parents lists sibling-linked parent versions (Team/EU v1 next to v2).

Test plan

• bun t server/tests/integration/catalog-v2/plans/licenses/mix/all-versions-parent-version-anchors.test.ts --headless
• bun t server/tests/integration/catalog-v2/plans/licenses/declared/declared-version-anchor.test.ts --headless
• bun t server/tests/integration/catalog-v2/plans/licenses/lifecycle/anchored-version-remove.test.ts --headless
• On the dashboard: open a parent v1 whose seat is anchored to child v1, confirm the child badge and Go to License land on that version
• Edit child v2 in place with Update all versions; confirm Parents lists Team/EU v1 and v2, and following All versions does not relink v1 → child v2

Made with Cursor

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Summary by cubic

Parent license links now stay anchored to the child version they point at instead of re-pointing to the newest child version when the child mints a new version or promotes. A version_slug in licenses[] is the only declared move; omitting it keeps the existing link, and new links default to the child's active row.

Behavior changes

• Child all_versions follow applies each parent version from the child sibling it is anchored to, leaving anchors in place.
• Removing or archiving a child version that parents still link to returns a 400 that names the parent plans.
• The dashboard "Go to License" opens the anchored child version, and the license parents list shows sibling-linked parent versions (for example Team/EU v1 next to v2).

Callers that relied on links automatically following a child mint or promote must now pass version_slug (or use propagate) to move them.

^{Written for commit e637862. Summary will update on new commits.}

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2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
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