Prevent Apdex Alerts from being triggered for periods with no transactions

### Environment

SaaS (https://sentry.io/)

### Version

_No response_

### Steps to Reproduce

1. Requires no transactions being accepted by your org, either intentionally or because of depleted quota
2. In the Web UI, go to Alerts -> Create Alert -> Apdex -> Set Conditions
3. On step 1, set the interval to "1 minute interval" for testing purposes
4. On step 3, choose "Static: above or below {x}" and set the "Critical field" to "Below 100"
5. No need to set actions on step 4
6. On step 5, give the rule a name and click "Save Rule"
7. Wait for the 1 minute interval to pass

### Expected Result

Because no transactions are being accepted by Sentry, either intentionally or because of depleted quota, there should be no alert triggered.

### Actual Result

Apdex is 0 and therefore an alert is triggered and the alert status is set to "Critical". Alert status remains that way since no transactions are being accepted.