feat(questions): wire pruneDeadTokens into onAnswerRevealed

functions/src/questions/onAnswerRevealed.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: when one partner OPENS (reveals) the shared answers — i.e. their own
@@ -107,6 +108,7 @@ export const onAnswerRevealed = functions.firestore
       if (r.status === 'rejected') failures.push(`${tokens[i]}: ${String(r.reason)}`)
     })
     if (failures.length > 0) console.error('[onAnswerRevealed] some notifications failed:', failures)
+    await pruneDeadTokens(db, partnerId, tokens, sendResults)
 
     console.log(`[onAnswerRevealed] notified ${partnerId} that ${userId} opened couple ${coupleId}`)
   })