Re-authors the nine User Tasks permissions as verbs on the user-tasks and
user-tasks/participants resources with a descriptor provider, replacing the
legacy verb:resource strings (UserTasksPermissions is removed along with the
other legacy constant classes). All 17 endpoints declare access through
RequirePermission, and UserTaskActor.HasPermission matches through
PermissionMatcher instead of string equality, so pattern grants reach these
endpoints for the first time. manage:user-tasks becomes user-tasks:supervise
to reflect that it grants oversight, not an aggregate. The migration guide
and contract specs carry the full mapping.
BREAKING CHANGE: legacy user-tasks permission strings no longer authorize
anything. Rewrite grants using the mapping table in
doc/migrations/authorization-model.md.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>