Two faults the guides plugin shipped with, both caught by gates that were
already there.
deploy/site-profile-universal.json never listed `guides`. That file is the
profile the released Windows installer is built from, so the wizard would not
have offered Guides at all - and worse, `flask plugin prune-schema` drops the
tables of any plugin absent from the profile at provisioning (ADR-014). A site
installing the next release would have had its guides table dropped.
plugins/guides/models/guide.py imported shopdb.core.models.base directly.
Plugins reach core only through shopdb.api or shopdb.plugins.base (ADR-001),
and shopdb.api already re-exports BaseModel, so this is the same symbol by the
supported path.
The suite was red on main because of these two; it passes again.
e2a226e8b0