Helps with #11841.
It was complaining *a lot*, with dozens of MB of logs.
StoreReference::render
This will be needed for the next step. Also allows us to write round trip tests.
Need to decouple parsing from actually opening a store for Machine configs. Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com> Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
