Ability to restrict the length of generated sql:sanitize data

[robme]

Is your feature request related to a problem? Please describe.
I've used sql:sanitize on a basic Drupal Commerce site, and it filled in user fields with random data. Two of the fields are for first name and last name and the data it generates is not appropriate. For example, everyone's name is:

Autem decet nostrud quis sagaciter suscipere. Cui hendrerit in iusto luptatum probo vereor. Abluo adipiscing aliquam appellatio augue bene magna nibh tation ut. Abbas causa eu singularis. Abbas iusto minim voco. Accumsan huic nutus refero tincidunt. Commodo exerci molior praemitto qui. Bene cui defui facilisis nulla sagaciter sed suscipere usitas volutpat.

The first name is also used in hook_user_format_name_alter() and this means the admin toolbar is broken because it has this large paragraph of text over the top of it.

Describe the solution you'd like
My idea is an option passed which lets you specify fields which should not fill the full length.

Describe alternatives you've considered
There may be better ways of having more precise control over the data per field but I am not sure how that would work.

Additional context
Add any other context or screenshots about the feature request here.

[robme]

I implemented my idea here on 12.x which can be seen in this PR: robme#1

Not sure how common this might be or whether more granular control could be done - like something similar to a regex to say what type of data should go in each field.

[weitzman]

It is the responsibility of the field type (i.e. text) to generate a sample value and to respect the max/min and such. See

drush/src/Commands/sql/sanitize/SanitizeUserFieldsCommands.php

Line 74 in 68e5d4b

$value_array = $field_type_class::generateSampleValue($def);

. Maybe there is a bug here for your field type and configuration.