Just a few points
If you run the ground wire you need to purchase a ground bar to install in the panel. Which lends to what are you going to do for your branch circuits. Ground wires in those also?
Your code only requires metal conduit I see no reason to run the ground wire. Just so you will know something like 60% of ground fault current will use the conduit the rest over the ground wire you install.....parallel paths
hopefully that never happens.
That panel will allow a backfed main breaker if you ever chose to install one.
You have done an excellent job of researching your project ...