[minor] stamp OpenTelemetry span attributes in UpdateActor

[Troy Chiu (troychiu)]

This PR adds missing OpenTelemetry span attributes in UpdateActor and corresponding tests.

• Tests pass
• Appropriate changes to documentation are included in the PR

[Eitan Yarmush (EItanya)]

Krisztian F (@krisztianfekete)

[Krisztian F (krisztianfekete)]

This looks good to me, just added a nit test comment.

[Krisztian F (krisztianfekete)]

Do you mind adding a failed lookup test case so a missing actor path is guarded? Similar to

substrate/cmd/ateapi/internal/controlapi/pause_actor_test.go

Lines 32 to 52 in aa1d14a

	func TestPauseActor_FailedLookupStampsRefIdentityOnly(t *testing.T) {
	ns := namespaceForTest("ns-span-pause-err")
	tc := setupTest(t, ns)
	defer tc.cleanup()
	attrs := recordRootSpanAttrs(t, func(ctx context.Context) {
	if _, err := tc.service.PauseActor(ctx, &ateapipb.PauseActorRequest{
	Actor: &ateapipb.ObjectRef{Atespace: testAtespace, Name: testActorID},
	}); status.Code(err) != codes.NotFound {
	t.Fatalf("PauseActor(missing) error = %v, want code NotFound", err)
	}
	})
	assertSpanStr(t, attrs, ateattr.AtespaceKey, testAtespace)
	assertSpanStr(t, attrs, ateattr.ActorNameKey, testActorID)
	for _, k := range []attribute.Key{ateattr.ActorUIDKey, ateattr.TemplateNameKey, ateattr.TemplateNamespaceKey, ateattr.ActorVersionKey} {
	if _, ok := attrs[k]; ok {
	t.Errorf("unexpected %s on failed-pause span", k)
	}
	}
	}

[Troy Chiu (troychiu)]

Updated! Thank you

[Troy Chiu (troychiu)]

Rebased onto main.

[Troy Chiu (troychiu)]

Eitan Yarmush (@EItanya) can we merge this?

[Eitan Yarmush (EItanya)]

Sorry, ended up with conflicts from another merge :(

[Troy Chiu (troychiu)]

Just rebased onto main! Thank you.