We need consistent values in the FieldViolation.reason field.

For example:

As I can see from Google Ads API, developers put field-specific values like MISSING_DISPLAY_URL in the reason field.

This creates bloated frontend code where we have to check every possible variation:

if field_violation.reason === "DISPLAY_URL_MISSING"
if field_violation.reason === "SOMEOTHERFIELD_MISSING"
// ...etc...

Instead, we should standardize to something like:

if field_violation.reason === "FIELD_REQUIRED"

or maybe even like this (for field violations only)

if field_violation.reason === "REQUIRED"