Every mutating admin action now dispatches a typed event on commit
(admin.user.created, admin.user.admin.granted/revoked,
admin.user.status.changed, admin.user.password.set,
admin.user.password_reset.sent, admin.user.deleted,
admin.project.owner.changed) which the audit catalog maps onto an
entry with the acting admin as actor and the affected user or project
as target. The model actions grow a doer parameter since the acting
admin was not threaded into the models layer before.
Admin creation deliberately emits both user.created (actor = the new
user, unchanged semantics) and admin.user.created (actor = the admin).
The events are instance-level, not project-scoped, so they are not
exposed as webhook events. No password or reset-token material is ever
part of a payload.
Move the admin overview computation and struct into models.BuildOverview /
models.Overview, the admin create-user flow into models.CreateUserAsAdmin /
models.CreateUserBody, and the admin user response view into a new
pkg/routes/api/shared package (shared.AdminUser / shared.NewAdminUser) so both
the v1 and v2 admin routes call the same code. The v1 handlers are refactored
onto these helpers and stay byte-identical on the wire.
