Improve Documentation for ESRP and Binary-Validation-Error

It isn't clear what `Binary-Validation-Error` actually means and why it is blocking. Documentation should be improved

Start by locating the existing documentation that mentions ESRP and Binary-Validation-Error, then read the surrounding guidance to identify what is missing. Done means the documentation clearly explains what Binary-Validation-Error means and why it blocks progress; the issue does not name a file or test to run.

Written by the indexing model from the issue text.