ClubMembership is now tied to a Season (plus status / fee_status / sign-up
dates) and unique per (club, member, season). The CSV importer attaches
each membership to the club's current season (Season.get_current), skipping
the row with a clear error when none exists; the now-unreachable
"clubs created" bookkeeping is removed.
Register SeasonAdmin and rebuild ClubMembershipAdmin for the new fields, and
add an admin smoke test that asserts every model in authentication/club/
members/teams is registered and its changelist + add pages load.
Convert every unique_together to a Meta UniqueConstraint (Season,
ClubMembership, FamilyMembership) per Django's guidance. Regenerate
migrations. club, members, and importer stay at 100% coverage.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Bernard Siebens
dd2e4b2169