Survey current in-person speakers

We should probably build a profile of current speakers who are deputating, to help understand whether we are creating meaningful change once we start offering remote deputations.

Brainstorming: https://docs.google.com/document/d/1kKkodfd5fXMWodugVZ9n0n8ScOMteYSGfvjmWdIne0U/edit#

Start with the linked brainstorming document to understand the proposed profile of current in-person speakers. The issue names no files, tests, data source, or acceptance criteria, so the scope and definition of done would need to be established before implementation.

Written by the indexing model from the issue text.