Validate backend series names after OTLP-to-Prometheus translation

Dashboard contracts must validate the series names stored by the query backend, not only the OpenTelemetry instrument names emitted by code. OTLP-to-Prometheus translation can append unit or type suffixes, such as milliseconds on histograms or ratio on unit-one gauges, while export remains healthy. Before shipping Grafana dashboards or alerts, enumerate backend metric names for the exact resource scope, map each instrument to its translated series, and test generated queries against that inventory. This catches silent No Data panels that unit tests against raw names miss. Native Prometheus exporters may follow different naming rules.

Applies when: Grafana queries OpenTelemetry metrics through an OTLP-to-Prometheus translation pipeline. Keywords: Grafana OpenTelemetry OTLP Prometheus metric names unit suffix histogram gauge