Creating new qualifying scoring_events or season_participants now
auto-upserts the matching canonical rows. Needed so the check constraint
doesn't reject qualifying events, and so new season participants
flow through syncTournamentResults.
- Extract tournament identity shared between backfill and event-creation
into app/lib/tournament-identity.ts; scripts/backfill re-exports it.
- createScoringEvent + bulkCreateScoringEvents now accept tournamentId.
- Event creation routes auto-compute (name, year) and upsert tournament.
- createParticipant + createManyParticipants auto-link to canonical
participants by (sportId, name).
Phase 3 Task 7 of canonical tournament layer migration.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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