Should a listed surname spelling count inside a hyphenated or particle-led surname? (Smyth-Jones / Smith conflicts even with Smyth listed as Smith) #1262

With Lexicon.default().add("smyth", kind="family", same_as="smith"):

• Ann Smyth / Ann Smith reads listed-spelling
• Ann Smyth-Jones / Ann Smith reads conflict

part-of-other compares hyphen halves and particle-free words by fold only, never through listed spellings. Extending listed spellings to those words is new matching behavior. It needs two things:

• a measurement of which shipped same_as family links would start matching inside compound surnames
• a key check, since the keys already emit each half's spellings

Raised by the simplify pass of #1221.