ensure otel tracing is passed through all event handlers and clients

internal/metal/providers/emgql/client.go

@@ -5,6 +5,7 @@ import (
 	"net/url"
 	"time"
 
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 	"go.uber.org/zap"
 
 	"go.equinixmetal.net/infra9-metal-bridge/internal/metal/providers"
@@ -16,7 +17,8 @@ const (
 
 // DefaultHTTPClient is the default http client used if no client is provided.
 var DefaultHTTPClient = &http.Client{
-	Timeout: defaultHTTPTimeout,
+	Timeout:   defaultHTTPTimeout,
+	Transport: otelhttp.NewTransport(http.DefaultTransport),
 }
 
 var _ providers.Provider = &Client{}