Packages can declare `adoptable: true` in their manifest. When a team
adopts an adoptable package, a team-scoped copy is created that references
the original via `adopted_from` (shared assets, no disk duplication).
The package's `requires_roles` auto-populate into a new `team_role_catalog`
table so team admins know which roles to assign.
Migration 017: adoptable/adopted_from columns on packages, team_role_catalog
table. 4 new endpoints (adopt, list adoptable, unadopt, role catalog).
AdoptTeamWorkflow deprecated. 11 new tests, all passing.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
