Flush cache when reset db (#5214)

Now that we have persistent cache for schemas, we want to be able to
reset its state when users run the database:reset db otherwise schemas
won't be synced with the new DB state.

Note: In an upcoming PR, we want to be able to invalidate the cache on a
workspace level when we change the metadata schema through twenty
version upgrade

packages/twenty-server/src/engine/integrations/cache-storage/cache-storage.service.ts

@@ -63,6 +63,10 @@ export class CacheStorageService {
     });
   }
 
+  async flush() {
+    return this.cache.reset();
+  }
+
   private isRedisCache() {
     return (this.cache.store as any)?.name === 'redis';
   }