Pledge: mark needed fields as required in schema

[eileenmcnaughton]

Overview

This marks all the fields that are not optional as required. I've been having a bit of a battle adding
a v4 api & I hope this will help - but if not, it's correct for them to be marked required anyway

Before

Fields not identified as required , but they are

After

Fields marked required

Technical Details

As with the schema changes to financial type - there is still an outstanding upgrade script - I'll do both together once I've finalised #19296

Comments

[civibot]

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[eileenmcnaughton]

test this please

[colemanw]

@eileenmcnaughton I'm happy to merge this but it definitely needs the upgrade script and we're about to branch RC.

[eileenmcnaughton]

Update script in update script in #19335