Summary

Remove the authority information from the IDENTIFIER blocking key, resulting in {value[-4:]}:{type}. There is no validation on authority, and too much variation is possible, which would likely constrain our result sets too early on in the process.

Acceptance Criteria

• Update the IDENTIFIER blocking key generation in schemas/pii.py
• Update test cases with the change, if no tests fail, add a new one
• Update documentation in site/reference.md

Details / Tasks

The current blocking key values are in the form of {value[-4:]}:{authority[:2]}:{type}, this should be replaced with {value_part[-4:]}:{type_part}.

Background / Context

Provide any additional context, background information, or references that might be useful for understanding the issue.