Implement algorithm to match dancers with recorders based on:
- Heat collision avoidance (division + competitionType + heatNumber)
- Buffer time (1 heat after dancing before can record)
- Location preference (same city > same country > anyone)
- Max 3 recordings per person
- Opt-out support (falls to bottom of queue)
New API endpoints:
- PUT /events/:slug/registration-deadline
- PUT /events/:slug/recorder-opt-out
- POST /events/:slug/run-matching
- GET /events/:slug/match-suggestions
- PUT /events/:slug/match-suggestions/:id/status
Database changes:
- Event: registrationDeadline, matchingRunAt
- EventParticipant: recorderOptOut
- RecordingSuggestion: new model for match suggestions
