blocksAsJSON migration helper requires Typescript in production (v 3.73.0)

[chrisstpierre]

Describe the Bug

In PR #15257 typescript is imported on line 19 of packages/drizzle/src/utilities/blocksToJsonMigrator.ts. Because this is included in @payloadcms/db-postgres, @payloadcms/db-vercel-postgres and @payloadcms/db-sqlite it means that Typescript is now imported in production if you use one of these packages, e.g. next standalone build produces a top-level a.exports=require("typescript"). Prior to 3.73.0 typescript was not required in production.

One solution is to use a dynamic import instead of the top-level import * as ts from 'typescript' so that typescript is only required in the environment where this code is ran.

Link to the code that reproduces this issue

#15257

Reproduction Steps

Deployed payload using @payloadcms/db-postgres in a production environment without Typescript using a standalone build and got this error when loading the admin page:

Cannot find module 'typescript'
Require stack:
- /var/task/.next/server/app/(payload)/admin/[[...segments]]/page.js
- /var/task/node_modules/next/dist/server/require.js
- /var/task/node_modules/next/dist/server/next-server.js

Reverting to 3.72.0 fixes the issue.
The root cause should be obvious from the provided description.

Which area(s) are affected?

db: postgres

Environment Info

Binaries:
  Node: 25.2.1
  npm: 11.6.2
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  payload: 3.73.0
  next: 15.5.11
  @payloadcms/db-postgres: 3.73.0
  @payloadcms/drizzle: 3.73.0
  @payloadcms/email-nodemailer: 3.73.0
  @payloadcms/graphql: 3.73.0
  @payloadcms/next/utilities: 3.73.0
  @payloadcms/plugin-cloud-storage: 3.73.0
  @payloadcms/plugin-form-builder: 3.73.0
  @payloadcms/plugin-search: 3.73.0
  @payloadcms/richtext-lexical: 3.73.0
  @payloadcms/storage-s3: 3.73.0
  @payloadcms/translations: 3.73.0
  @payloadcms/ui/shared: 3.73.0
  react: 19.2.4
  react-dom: 19.2.4
Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 25.1.0: Mon Oct 20 19:34:03 PDT 2025; root:xnu-12377.41.6~2/RELEASE_ARM64_T8142
  Available memory (MB): 24576
  Available CPU cores: 10