redis pt 2: read cache wiring & event based invalidations

src/users/events/user.events.ts

@@ -2,6 +2,7 @@ import { Doll } from '@prisma/client';
 
 export const UserEvents = {
   ACTIVE_DOLL_CHANGED: 'user.active-doll.changed',
+  SEARCH_INDEX_INVALIDATED: 'user.search-index.invalidated',
 } as const;
 
 export interface UserActiveDollChangedEvent {
@@ -9,3 +10,7 @@ export interface UserActiveDollChangedEvent {
   dollId: string | null;
   doll: Doll | null;
 }
+
+export interface UserSearchIndexInvalidatedEvent {
+  userId?: string;
+}