infer_payments was building member_names from get_members_with_fees()
(adults sheet only). Junior-only members were invisible to the matcher,
so a payment message containing an exact junior name would produce a
fuzzy review match against a different adult sharing the same first name.
Fix: union the adult and junior rosters (deduped via canonical_member_key)
so all members are candidates. The existing exact-name short-circuit in
match_members then handles precedence correctly.
Two regression tests added for the Jáchym Kubík / Jáchym Hrušák case.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
match_members() now short-circuits on whole-word full-name hits and
uses word-boundary regex everywhere else, so a nickname that is a
substring of another member's surname (e.g. "tov" inside "ottova")
no longer produces false positives. Adds tests/test_match_members.py.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
