fix: convert Buffer to Uint8Array for browser hydration compatibility

[boomyao]

Summary

The workflow web inspect (>= 4.1.0-beta.56) now performs client-side hydration using hydrateData() from @workflow/core/serialization-format. This function checks for Uint8Array using instanceof, which fails for Buffer in the browser since Buffer doesn't exist in browser environments.

This fix ensures that MongoDB Binary data is converted to true Uint8Array before being returned, enabling proper data hydration in workflow web inspect.

Changes

• Add bufferToUint8Array() helper function
• Update stripUndefined() to convert Buffer/Binary to Uint8Array
• Update cleanMongoDoc() to convert Buffer/Binary to Uint8Array
• Update dependencies to latest workflow versions

Compatibility

• workflow >= 4.1.0-beta.56: Required for web inspect to work properly
• workflow < 4.1.0-beta.56: Backwards compatible - Uint8Array is a parent class of Buffer, so existing code continues to work

Testing

All 55 tests pass:

✓ test/spec.test.ts (5 tests)
✓ test/output-preservation.test.ts (14 tests)
✓ test/event-sourcing.test.ts (14 tests)
✓ test/serialization.test.ts (8 tests)
✓ test/hooks.test.ts (6 tests)
✓ test/streamer.test.ts (7 tests)

Signed-off-by: Assistant assistant@cursor.com

Made with Cursor