Follow-up to the commit fix, from the deep-review. Persisting the account was
only half the story: when the admin had approved the address BEFORE the person
registered, the account landed is_active=False against an invite that is no
longer pending — absent from the Access-requests queue, and approve_invite 409s
on an already-decided invite. The sign-up worked and still could not sign in.
Derive activation from is_allowed() at the moment ownership is attested:
- verify_email_confirm activates a pre-approved account when the emailed link is
confirmed (only the mailbox owner can follow it), so SEC-10 stays intact;
- _register_account activates only when there is no SMTP to verify with, where
the admin whitelist is by design the sole gate — the same one add_invite
already activates on.
Tests: the pre-approved no-SMTP case and the verify-activates case are real
regression tests (both fail without this change); guards cover the unknown-email
and denied->pending branches, verification of an unapproved account, and the
first end-to-end coverage of the /auth/register route and its
allow_registration gate. Release notes rewritten — the previous entry miscounted
its regression tests and advertised an email fix this release has no code for.