When uptime kuma is down, tracking time is skipped

📑 I have found these related issues/pull requests Had a quick search and could not find anything 🛡️ Security Policy • I have read and agree to Uptime Kuma's [Security Policy]( 📝 Description • When UptimeKuma is down, it obviously cannot record downtime. • The problem is that when it starts up again, it does not display a gap in the measurements • This causes it to falsely claim 100% uptime if it was not there to record the downtime <img width="418" height="275" alt="Image" src=" /> <img width="418" height="275" alt="Image" src=" /> 👟 Reproduction steps 1. Shut down UptimeKuma (in my case, my server unexpectedly shut down for about 5 hours while I was asleep) 2. Start it up again 3. Observe that no downtime is recorded. 👀 Expected behavior UptimeKuma would list the times it could not perform the request as unrecorded (eg grey) 😓 Actual Behavior UptimeKuma does no…