feat(backend): send emails daily instead of hourly (#9927)

<!-- Clearly explain the need for these changes: -->

John thinks an hourly email is a bit much; I'm inclined to agree.

### Changes 🏗️

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-->
swaps the time for dealing the batch for the agent runs from one hour to
one day

### Checklist 📋

#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
  <!-- Put your test plan here: -->
  - [x] No testing done

autogpt_platform/backend/backend/data/notifications.py

@@ -369,7 +369,7 @@ class UserNotificationBatchDTO(BaseModel):
 
 def get_batch_delay(notification_type: NotificationType) -> timedelta:
     return {
-        NotificationType.AGENT_RUN: timedelta(minutes=60),
+        NotificationType.AGENT_RUN: timedelta(days=1),
         NotificationType.ZERO_BALANCE: timedelta(minutes=60),
         NotificationType.LOW_BALANCE: timedelta(minutes=60),
         NotificationType.BLOCK_EXECUTION_FAILED: timedelta(minutes=60),