FYI for others that may read this post.
I only posted this to get feedback from other users. I didn't think anything was actually needed because the DB server is separate from the App server. But I needed to document my project document with feedback from others and/or the vendor (Orion).
I opened a case and was told that all that was needed was to ensure the DB was backed up and the SolarWinds services were stopped before starting the upgrade. I assume this is just a good safe practice.