Show answer constraints to applicants for questions that have them

[jeffpw-goog]

Is your feature request related to a problem? Please describe.

When answering a question with constraints (e.g. an enumerator question that allows up to 3 answers), the applicant has no way to know there is a constraint unless they violate it and try to submit. This can waste applicant time and be frustrating.

Example of current behavior (after clicking "Save and next") with a number question limited to 1-10:

Describe the solution you'd like.

The applicant UI should show question constraints proactively so that the applicant is aware of them up front.

What priority is this?

Probably a medium-low priority because it's just a frustration/usability issue, not a functional blocker, but it also should be a small-ish effort to fix so it might be worth considering in the northstar work.

Additional context

We considered adding this for the enumerator limits but skipped it for consistency, and we plan to add it for multiple file uploads, so it would be good to be consistent across all questions.

Here are all the questions that have this type of constraint:

• Number - min/max value
• Checkbox - min/max number of choices
• ID - min/max value length
• Text - min/max value length
• File upload - max files
• Enumerator - min/max entities

[jeffpw-goog]

A couple related cases:

• File upload questions only allow certain file types (jpg and pdf I think?) but it's not documented anywhere
• The program image only allows certain file types (jpg I think? maybe other image types?)