fix: Improve state handling to avoid stuck triggered cameras (#2348)

- Related:
https://github.com/dermotduffy/advanced-camera-card/issues/2342

src/camera-manager/types.ts

@@ -140,6 +140,10 @@ export interface EngineOptions {
 export interface CameraEvent {
   cameraID: string;
 
+  // Source ID (e.g. entity ID or Frigate event ID), used to determine what has
+  // triggered/untriggered.
+  id: string;
+
   type: 'new' | 'update' | 'end';
 
   // When fidelity is `high`, the engine is assumed to provide exact details of