add trace starts for each object type

internal/service/process_memberships.go

@@ -5,6 +5,8 @@ import (
 	"strings"
 
 	"go.infratographer.com/x/gidx"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
 	"golang.org/x/exp/slices"
 
 	"go.equinixmetal.net/infra9-metal-bridge/internal/permissions"
@@ -13,6 +15,15 @@ import (
 // processMemberships determines the changes between what is wanted and what is live and executes on the differences.
 // If skipDeletions is true, no deletes will be executed.
 func (s *service) processMemberships(ctx context.Context, relationships Relationships, skipDeletions bool) (int, int) {
+	ctx, span := tracer.Start(ctx, "processMemberships",
+		trace.WithAttributes(
+			attribute.String("resource.id", relationships.Resource.PrefixedID().String()),
+			attribute.Int("resource.memberships", len(relationships.Memberships)),
+		),
+	)
+
+	defer span.End()
+
 	if len(relationships.Memberships) == 0 {
 		return 0, 0
 	}