[Session] Drill getAgent into notifications/utils (#3703)

* Drill into notifications/util

(cherry picked from commit 84b535ed54f4fe93debcd198809bb184519c3507)

* Thread getAgent instead

---------

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>

src/state/queries/notifications/unread.tsx

@@ -144,6 +144,7 @@ export function Provider({children}: React.PropsWithChildren<{}>) {
 
           // count
           const {page, indexedAt: lastIndexed} = await fetchPage({
+            getAgent,
             cursor: undefined,
             limit: 40,
             queryClient,