Make streaming by domain work

src/interfaces/DittoEvent.ts

@@ -17,6 +17,7 @@ export interface EventStats {
 /** Internal Event representation used by Ditto, including extra keys. */
 export interface DittoEvent extends NostrEvent {
   author?: DittoEvent;
+  author_domain?: string;
   author_stats?: AuthorStats;
   event_stats?: EventStats;
   d_author?: DittoEvent;