feat(questions): wire pruneDeadTokens into onMessageWritten

functions/src/questions/onMessageWritten.ts

@@ -1,6 +1,7 @@
 import * as functions from 'firebase-functions'
 import * as admin from 'firebase-admin'
 import { recipientInQuietHours } from '../notifications/quietHours'
+import { pruneDeadTokens } from '../notifications/pruneTokens'
 
 /**
  * Firestore trigger that notifies the other partner when a chat message is
@@ -120,6 +121,8 @@ export const onMessageWritten = functions.firestore
       console.error(`[onMessageWritten] some notifications failed:`, failures)
     }
 
+    await pruneDeadTokens(db, partnerId, tokens, sendResults)
+
     console.log(
       `[onMessageWritten] notified partner ${partnerId} for conversation ${conversationId} in couple ${coupleId}`
     )