fix(core): tick the piggyback cron scheduler from the middleware request path

[swissky]

What does this PR do?

On Cloudflare Workers the middleware selects the PiggybackScheduler, whose contract is "call this from middleware on each request" — but runtime.tickCron() had no call sites, so plugin cron tasks never executed on Workers (overdue tasks sat at status = idle forever; details and field evidence in #1422).

This adds the tick to both request branches of the middleware:

• the anonymous fast path (right after the runtime is initialized for page hooks), and
• the full runtime path (admin/API/authenticated traffic).

PiggybackScheduler.onRequest() debounces internally (60s) and runs fire-and-forget via Promise.allSettled, so requests gain no latency. On Node the scheduler is the NodeCronScheduler, for which tickCron() is a type-guarded no-op.

Tests: new middleware-cron-tick.test.ts (modeled on middleware-prerender.test.ts) pins one tick per request on both paths — red before the fix, green after. The existing prerender test's MOCK_RUNTIME gained the tickCron member to match the runtime interface.

Closes #1422

Type of change

• Bug fix
• Feature (requires maintainer-approved Discussion)
• Refactor (no behavior change)
• Translation
• Documentation
• Performance improvement
• Tests
• Chore (dependencies, CI, tooling)

Checklist

• I have read CONTRIBUTING.md
• pnpm typecheck passes (packages/core)
• pnpm lint passes (lint:quick clean)
• pnpm test passes (targeted: tests/unit/astro/middleware-*.test.ts — 13/13 green; tests/unit/astro/vite-config.test.ts fails 8/8 on my machine on unmodified main too — environmental, untouched by this PR)
• pnpm format has been run
• I have added/updated tests for my changes (if applicable)
• User-visible strings in the admin UI are wrapped for translation (n/a — no UI strings)
• I have added a changeset (emdash patch)
• New features link to an approved Discussion (n/a — bug fix)

AI-generated code disclosure

• This PR includes AI-generated code — model/tool: Cursor + Fable 5 (reviewed and verified by a human before submission)

Screenshots / test output

❯ vitest run tests/unit/astro/middleware-cron-tick.test.ts   # before fix
  × ticks the cron system on anonymous public page requests  (expected 1 call, got 0)

❯ vitest run tests/unit/astro/middleware-cron-tick.test.ts tests/unit/astro/middleware-prerender.test.ts   # after fix
  Test Files  2 passed (2)
       Tests  13 passed (13)

[changeset-bot]

🦋 Changeset detected

Latest commit: 3c881f9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 14 packages

Name	Type
emdash	Patch
@emdash-cms/cloudflare	Patch
@emdash-cms/sandbox-workerd	Patch
@emdash-cms/fixture-perf-site	Patch
@emdash-cms/perf-demo-site	Patch
@emdash-cms/cache-demo-site	Patch
@emdash-cms/admin	Patch
@emdash-cms/auth	Patch
@emdash-cms/blocks	Patch
@emdash-cms/gutenberg-to-portable-text	Patch
@emdash-cms/x402	Patch
create-emdash	Patch
@emdash-cms/auth-atproto	Patch
@emdash-cms/plugin-embeds	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[ascorbic]

Thanks. This was already fixed in #1312, which was merged today