feat(agent): run the ship gate on every push, draft included

[patroza]

Why

A draft push was free — no check, no lint, no tests. Broken commits reached
branches that reviewers and other agents pick up, and CI was the first thing to
notice.

What

The ship gate now runs on every agent push, whatever the PR state. This is a
library monorepo: the gate is pnpm check → pnpm lint → pnpm test, with no
browser or API suite a draft could usefully defer, so there is nothing left to
exempt a draft from.

How

pre-push no longer resolves PR state at all — gh cannot change the outcome,
so asking it was only a way to fail. shouldRunShipGateOnPush is gone with its
last caller; resolveOpenPrState stays for the publish path.

The existing HEAD-SHA cache is unchanged, so pushing a commit and then
publishing it still pays for the gate once.

Remarks

Sibling PRs in macs-scanner and macs-configurator keep a cheaper "static" scope
for drafts, because those gates do have an expensive e2e half worth deferring.

Verified by this branch's own push: the full gate ran green before the branch
went up.

🤖 Generated with Claude Code

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