Draft: Set default value for flow and third party flows

Vanessa Ottorequested to merge
578228-show-yaml-editor-for-dap-flows--frontend-6 into 578228-show-yaml-editor-for-dap-flows--frontend-4

What does this MR do and why?

References

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DAP Flow 3P Flow
Screenshot_2025-11-05_at_16.23.19

How to set up and validate locally

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Related to #578228

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