[AC-5039] update the migration script:
[AC-5039] update the migration script:

- fix a few comments.
- add missing fields to accelerator_startupprograminterest.
- change content types editing to address issues with fluent pages.
- some style improvements.

masschallenge/impact-api,masschallenge/impact-api,masschallenge/impact-api,masschallenge/impact-api