HPCC-31654 Include DFU WUs in metrics timeline

[GordonSmith]

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[github-actions[bot]]

Jira Issue: https://hpccsystems.atlassian.net//browse/HPCC-31654

Jirabot Action Result: Workflow Transition: Merge Pending Updated PR

[shamser]

wudetails @ghalliday I have created a Jira for this: https://hpccsystems.atlassian.net/browse/HPCC-32127. I am trying to work out how ECL Watch could specify the required information for the timeline. One option is to have the request specify the scope types (Workflow, graph, subgraph, dfu) and not the depth. The iterator works the correct depth for the different scope types. Another option is to create a new "time elapsed" attribute for the containing operations scope, so that depth 3 may be used. What do you think?

[GordonSmith]

I believe this PR will also fix this issue: https://github.com/hpcc-systems/HPCC-Platform/pull/18854

[GordonSmith]

Closing in favor of: https://github.com/hpcc-systems/HPCC-Platform/pull/18854