test(announce): verify the announce push path end-to-end (channel routing + item format)

[obrien-k]

What

The Release-Announce push path (announce.ts / announceJob.ts → korin.pink POST /irc/announce, ADR-0013) is built, but the delivery end has never been verified end-to-end: does each new Contribution actually land in the intended IRC channel, and does the pushed item shape match what korin's renderer expects?

Scope

• Drive a real (or staged) contribution through the push path and observe the rendered announce on the korin side.
• Assert the item format contract (fields, escaping, link target — delivery is notify-and-link per IRC & Announce: decide announce delivery shape (HITL) #136, never a tokenized URL).
• Fix or file whatever the verification surfaces (routing config, format drift).

Carried as a "verify channel routing/format" annotation in local parity notes since 2026-06; promoting it to a tracked item. Related: #141 (channel weights), #177 (access-gated delivery) — both assume this path works.

Surfaced by the 2026-07-08 parity harvest.

[obrien-k]

Branch feat/irc-announce: the announce push path is now verified. The untested cursor/retry loop is covered (extracted as runAnnounceCycle for deterministic testing — advance-on-2xx, hold-and-retry-on-failure, in-order, startup seed to MAX(id) so history is never replayed), the korin POST /irc/announce wire contract is pinned against InboundFeedSchema ({xmlPayload, templateType:'minimal', environment:{osc8}}, plain notify-and-link, no tokenized URL), and getNewAnnounceItems cursor query is covered. Added a live end-to-end runbook at docs/runbooks/announce-e2e.md for the observe-on-korin half. Closeable on merge.