Store Start Date and Time (UTC) for Actions/Process Indefinitely

Reviewing past models or model history (archived) for even our current live models the Start Date and Time (UTC) for Actions/Processes is not populated for anything that's been run more than ~1 month ago. This feels like a gap in how this field should function.

Proposal: The Start Date and Time (UTC) for Actions/Processes should stay populated indefinitely to allow a model builder to judge whether certain actions should be cleaned up based on their use.