Route metric queries through Grafana /api/ds/query instead of direct Prom
(Prom is firewalled / unreachable from Manage; Grafana is the only path).
Partial revert of prometheus-direct-charting: keep the gauge/mean/
LineSeriesChart rendering, restore the frames->series normalizer (recovered
from git 65bae95), change prometheus service config to hold Grafana gateway
fields (url + api_key + datasource_uid). Rename widgets to neutral Metric*.
First non-additive canonical sync (prometheus-charting MODIFIED). Updates the
pending service-credential-tester proposal dependency.
Developer
8afdd9c2bc