Infer the author of new tracked changes between modifiedDir and
originalDocx. Returns the single new author when exactly one is found,
defaultAuthor when no new authors are detected, and throws when more
than one author has added changes (ambiguous; caller must pick).
defaultAuthor is required — there is no built-in fallback string.
Infer the author of new tracked changes between
modifiedDirandoriginalDocx. Returns the single new author when exactly one is found,defaultAuthorwhen no new authors are detected, and throws when more than one author has added changes (ambiguous; caller must pick).defaultAuthoris required — there is no built-in fallback string.