Consolidates the pairing/allowlist authorization model. Reverses the
read-side AND-ing from #56346 (which made a paired user require ALSO
being in the allowlist) and restores pairing as a first-class grant:
- authz_mixin: a pairing-store entry authorizes regardless of the
allowlist (union). approve_code is reachable only by the trusted
operator (CLI / authenticated dashboard), never by an inbound sender,
so it is not an attacker-controlled path — the #23778 bypass was the
inbound message/approval-button gate, fixed separately.
- pairing: when an allowlist IS already configured for the platform,
operator approval also appends the user to that allowlist env var
(option i) and revoke removes them, keeping a single operator-visible,
editable source of truth instead of an opaque approved.json. On an
open gateway (no allowlist) approval is a no-op on the env var so we
never silently lock an open gateway; the pairing store remains the
grant record, honored by the union.
- auto-resume authz (0de67ad60) now honors paired users automatically
via the same union — a legitimately-paired session survives restart.
Replaces the now-incorrect AND-ing tests with union + mirror + revoke
coverage. E2E verified: locked-gateway approve/revoke round-trips
through the allowlist; open-gateway approval stays open.
1bfe08145c