Fixes #20498: Apply validation regex to URL custom fields #20625
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Fixes: #20498
The
validation_regex
field was not being enforced for URL type custom fields. This fix adds regex validation in two places:to_form_field()
- Applies regex validator to form fields (UI validation)validate()
- Applies regex check in model validation (API/programmatic)The original issue reported UI validation only, but this fix also adds API validation for consistency with text field behavior and to ensure data integrity across all entry points.