Create pipeline monitoring

[woolfg]

The pipeline to import data can fail from time to time. We have multiple options:

• send information if error encountered in connector run (could be done in github actions?)
• run SQL check queries to monitor if everything is up and running? maybe some healthcheck endpoints in the api which can be then triggered by a daily monitoring test form outside

could be added to /status endpoint

[mre]

As for the first part, we could set up Slack notifications for failed actions

[woolfg]

added a test metabase alert

[woolfg]

adapt dashboard api to be able to monitor by e.g. grafana cloud