Sqorz rider links

Verify each transponder number against the rider's Sqorz record. Add separate dated assignments for replacement or hired transponders. Blank dates mean no date limit; use exact dates for hired transponders. The same transponder cannot be assigned to different riders during overlapping dates. Names and member IDs are not used for matching.

Add a direct Sqorz rider-page URL as a fallback. Remove all transponder assignments to stop automatic matching; clear the fallback URL as well to unlink completely.

Manage each race's Sqorz event ID or event URL in Race Dates. Results are read-only; booking and scoring remain external.