Test workflow preview tarballs (aee5699) across examples

[pranaygp]

Summary

Bumps every example from workflow@4.2.4 (npm) to the preview tarballs at https://workflow-tarballs-h3imyuw9g.labs.vercel.dev (built from vercel/workflow@aee5699, published as workflow@5.0.0-beta.4-aee5699). Goal: validate the upcoming SDK release against the existing example projects.

This PR also includes:

• getWorld() is now async — adapted flight-booking-app/instrumentation.ts and postgres/instrumentation.ts to await getWorld() before calling .start?.().
• postgres switched from bun to pnpm — bun cannot resolve transitive HTTP-tarball deps (the workflow tarball depends on @workflow/utils etc. via tarball URLs, which bun fails to follow).

Validation results

Tested install + build + dev + workflow trigger across all 17 examples.

✅ Works end-to-end (workflow triggered, returned 200)

• hono — clean
• nitro (project) — vite warnings about dynamic imports, but trigger works
• tanstack-start — works
• sveltekit — works in dev (build fails — see below); ignores PORT env var
• astro — works in dev (build fails — pre-existing missing adapter); ignores PORT env var
• ffmpeg-processing — server up; workflow not exercised (needs VERCEL_OIDC_TOKEN)
• vite (project) — server up; build broken (pre-existing tsconfig issue)

❌ Runtime regression — all Next.js 16 examples

All Next-based examples crash at runtime:

Error: Cannot find module as expression is too dynamic
  at .next/dev/server/chunks/..._@workflow_core_dist_..._.js
  code: 'MODULE_NOT_FOUND'

Turbopack can't statically analyze a dynamic await import(handlerPath) inside the new @workflow/core. Verified: nextjs, actors. Likely also affects: ai-sdk-workflow-patterns, birthday-card-generator, flight-booking-app, postgres, rag-agent.

❌ Nuxt — RollupError

[nitro] ERROR RollupError: "./run.js" is imported as an external by
"@workflow/core/dist/runtime/start.js", but is already an existing non-external module id.

Standalone nitro project works because it pins nitro@3.0.1-alpha.1; nuxt internally uses Nitro 2.12.9.

❌ Build-only — sveltekit

@opentelemetry/api (peer dep) isn't externalized at build. Dev mode works.

Pre-existing (not tarball-related)

• astro — [NoAdapterInstalled] on build
• vite — tsconfig.app.json references missing src/

Test plan

• CI install across all examples
• Manual: kick off /api/signup on hono, sveltekit, astro, tanstack-start, nitro — should return 200
• Decide whether to land the postgres bun→pnpm switch, or keep bun and pin transitive @workflow/* deps another way
• File upstream issues against vercel/workflow for: turbopack dynamic-import regression, nuxt rollup external collision, sveltekit @opentelemetry/api resolution

🤖 Generated with Claude Code

[vercel]

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Project	Deployment	Actions	Updated (UTC)
birthday-card-generator	Ready	Preview, Comment	May 5, 2026 0:09am
flight-booking-app	Ready	Preview, Comment	May 5, 2026 0:09am