* provide better ctx for prom err * rework * Update pkg/tsdb/prometheus/prometheus.go Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com> * Update pkg/tsdb/prometheus/prometheus.go Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com> * call func Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>