[Nexus] Add logs when failed to parse links (#6447)

## What changed?
<!-- Describe what has changed in this PR -->
Add logs to errors failing to parse links.

## Why?
<!-- Tell your future self why have you made these changes -->

## How did you test it?
<!-- How have you verified this change? Tested locally? Added a unit
test? Checked in staging env? -->

## Potential risks
<!-- Assuming the worst case, what can be broken when deploying this
change to production? -->

## Documentation
<!-- Have you made sure this change doesn't falsify anything currently
stated in `docs/`? If significant
new behavior is added, have you described that in `docs/`? -->

## Is hotfix candidate?
<!-- Is this PR a hotfix candidate or does it require a notification to
be sent to the broader community? (Yes/No) -->

components/nexusoperations/executors.go

@@ -329,7 +329,12 @@ func (e taskExecutor) saveResult(ctx context.Context, env hsm.Environment, ref h
 					case string((&commonpb.Link_WorkflowEvent{}).ProtoReflect().Descriptor().FullName()):
 						link, err := ConvertNexusLinkToLinkWorkflowEvent(nexusLink)
 						if err != nil {
-							// silently ignore for now
+							// TODO(rodrigozhou): links are non-essential for the execution of the workflow,
+							// so ignoring the error for now; we will revisit how to handle these errors later.
+							e.Logger.Error(
+								fmt.Sprintf("failed to parse link to %q: %s", nexusLink.Type, nexusLink.URL),
+								tag.Error(err),
+							)
 							continue
 						}
 						links = append(links, &commonpb.Link{

service/frontend/nexus_handler.go

@@ -393,7 +393,9 @@ func (h *nexusHandler) StartOperation(
 			for _, link := range t.AsyncSuccess.GetLinks() {
 				linkURL, err := url.Parse(link.Url)
 				if err != nil {
-					// silently ignore for now
+					// TODO(rodrigozhou): links are non-essential for the execution of the workflow,
+					// so ignoring the error for now; we will revisit how to handle these errors later.
+					oc.logger.Error(fmt.Sprintf("failed to parse link url: %s", link.Url), tag.Error(err))
 					continue
 				}
 				nexusLinks = append(nexusLinks, nexus.Link{