ycb_django_pr13212

what a new run launched now would send

Make validators include the provided value in ValidationError
Description
	
It is sometimes desirable to include the provide value in a custom error message. For example:
“blah” is not a valid email.
By making built-in validators provide value to ValidationError, one can override an error message and use a %(value)s placeholder.
This placeholder value matches an example already in the docs:
​https://docs.djangoproject.com/en/3.0/ref/validators/#writing-validators

Work only inside this repository checkout. Make the code change the task
describes, keeping the diff focused — no drive-by refactors.

When you are done, leave your changes committed or in the working tree;
they are collected automatically.

Stay on this snapshot checkout (`task/ycb_django_pr13212`). Never checkout, pull, or rebase onto `main`. That branch is a README-only orphan.
Stay on this HEAD. Do not fetch another default branch. Push only on the Cursor-created `crazy-cursor/…` side branch from this HEAD.

Some past runs of this task were launched with a different prompt (the prompt template changed since, or those runs predate this benchmark's stored prompt). Each run persists the exact prompt it sent at launch — that per-launch record is the audit trail; this page shows only the current one.