Should cross-role matching align given, middle and nickname words in one pass? (today a matched middle word is removed and the rest re-compared) #1263

Under across-roles, J. Edgar Hoover / Edgar Hoover matches by consuming the middle word that resolves the given name and then re-comparing what is left of the middle. That is a second pass layered on the role-by-role table.

One alignment of each side's given, middle and nickname words against the other's would replace both the re-score and its index plumbing.

It would move some outcomes: middle rows that read one-side today might align differently. So it needs the oracle diff read word by word, and a decisions entry. Raised by the simplify pass of #1221.