Description

This changeset adds a pydantic validator that parses and normalizes suffixes according to a predefined mapping. I've left the mapping in an assets file in case we want to add roman numeral standardization at some later date.

Related Issues

Fixes #297

Additional Notes

I did some research on common suffixes in names in the US, and most results indicated it's pretty limited, just Junior, Senior, II, and III. It's easy to support roman numerals, as well as any other spelling or punctuated variants thereof, but given this I think leaving the suffixes we intend to support in an assets file (like with state abbreviations and street conventions) follows our established practice.

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