Tiltify campaign ID whose spotlight to fetch.
OptionalisPass true to aggregate over a team campaign.
OptionalliveWhen true, requests the currently-in-progress spotlight (?live=true).
When false (default), requests the last-computed spotlight
(?last=true) — useful for post-event snapshots.
OptionalsignalCancel on React unmount / other lifecycle events.
Params for fetchDonorSpotlight.