When using the .photos.asset schema for an AppEntity conforming to IndexedEntity, is there a way to trigger the rich grid layout in Spotlight results that native apps like Photos and Messages currently utilize?

Is there a hard limitation on the size or total number of entities that can be indexed by a single application? Additionally, are there any recommended performance thresholds or best practices when dealing with a large volume of entities (e.g., thousands to ~30K)?

Is there a supported way to differentiate the trigger source (i.e. Siri, Spotlight, or Shortcut) within the perform() method of an AppIntent?