Await what the transactions start (PostgreSQL pass follow-up): the outbox and CDN-purge queues' mark() ran each row's async write inside a sync db.tx callback without awaiting it. A sync callback that calls async code returns before the work is done, so writes could land outside or after their transaction. npm test 12/12.

ddiff --git a/server/events/outbox.js b/server/events/outbox.js
iindex 3a47b02..7b3943c 100644
---- a/server/events/outbox.js
++++ b/server/events/outbox.js
@@@ -109,7 +109,7 @@ function createRelay({ outbox, eventsUrl, intervalMs = 2000, tokenClient, tokenO
          return { ok: res.ok, status: res.status, text };
      }
  
--    async function mark(rows, fn) { await db.tx(() => { for (const r of rows) fn(r); }); }
++    async function mark(rows, fn) { await db.tx(async () => { for (const r of rows) await fn(r); }); }
  
      async function publishRows(rows) {
          let r;
ddiff --git a/server/purge.js b/server/purge.js
iindex 2362a51..8ac6155 100644
---- a/server/purge.js
++++ b/server/purge.js
@@@ -161,7 +161,7 @@ function createPurger({ db, config, fetchImpl = globalThis.fetch, log = console,
  
      const clip = (s) => (token ? String(s || '').split(token).join('[token]') : String(s || '')).slice(0, DETAIL_MAX);
  
--    async function mark(rows, fn) { await db.tx(() => { for (const r of rows) fn(r); }); }
++    async function mark(rows, fn) { await db.tx(async () => { for (const r of rows) await fn(r); }); }
  
      async function retryOrFail(rows, detail) {
          await mark(rows, async (r) => {