Deep review of the debt burn:
- `refusal_reason` told the user to reconnect on ANY token-endpoint failure — a 5xx, a 429, a
misconfigured client — while the grant stayed and the account still read as connected, with no
connect button. Only `invalid_grant` (the one that drops the grant) means reconnect now.
- `pins.reorder` writes only the rows that change, so two overlapping reorders each skipped rows
that matched in their own stale snapshot and interleaved into two pins on one slot. It locks the
user's pins first; the second waits and deals from the first's result.
- Adding a whitelist entry committed the invite and the activation it implies separately, and its
audit row was written before a new invite had an id (target NULL). One transaction, flushed for
the id.
- The mutation convention test skipped async routes and dicts returned by name: request-access,
purge-discovery and the subscription sync answered without `ok`. They do now, and the test
covers both. The helper-commit check looked only at `_`-names; it reads every non-route
function, which listed two deliberate committers (upsert_pending_invite, ensure_welcome) — now
allowlisted with their reasons.