feat: provide metrics endpoint (#3902)

* feat: provide metrics endpoint

* config

* enable otel metrics by default

Co-authored-by: Florian Forster <florian@caos.ch>

internal/telemetry/metrics/otel/config.go

@@ -8,6 +8,12 @@ type Config struct {
 	MeterName string
 }
 
+func NewTracerFromConfig(rawConfig map[string]interface{}) (err error) {
+	c := new(Config)
+	c.MeterName, _ = rawConfig["metername"].(string)
+	return c.NewMetrics()
+}
+
 func (c *Config) NewMetrics() (err error) {
 	metrics.M, err = NewMetrics(c.MeterName)
 	return err