This PR adds endpoints for public dashboards to retrieve data from the backend (trusted) query engine. It works by executing queries defined on the backend without any user input and does not support template variables.
* Public dashboard query API
* Create new API on service for building metric request
* Flesh out testing, implement BuildPublicDashboardMetricRequest
* Test for errors and missing panels
* Refactor tests, add supporting code for multiple datasources
* Handle queries from multiple datasources
* Explicitly pass no user for querying public dashboard
Co-authored-by: Jeff Levin <jeff@levinology.com>
This PR adds endpoints for saving and retrieving a public dashboard configuration and and api endpoint to retrieve the public dashboard.
All of this is highly experimental and APIs will change. Notably, we will be removing isPublic from the dashboard model and moving it over to the public dashboard table in the next release.
Further context can be found here: https://github.com/grafana/grafana/pull/49131#issuecomment-1145456952
