the test for this was broken, and we were missing this...

fixing the test takes a bit of work, but likely will dump these
older migrations soon..

ui/medashare/alembic/versions/dff0d9ed0be1_add_property_index.py

@@ -55,6 +55,8 @@ def upgrade() -> None:
             obj = mdb.MDBase.decode(data)
             ObjectStore._update_metadata_indexes(session, obj, strcache)
 
+        session.commit()
+
 def downgrade() -> None:
     # ### commands auto generated by Alembic - please adjust! ###
     op.drop_table('propmap')