add migration TODO

chain/consensus/filcns/upgrades.go

@@ -1571,6 +1571,9 @@ func UpgradeActorsV10(ctx context.Context, sm *stmgr.StateManager, cache stmgr.M
 		return cid.Undef, xerrors.Errorf("no manifest CID for v10 upgrade")
 	}
 
+	// TODO this is fine for now, but we need to also migrate the init actor state to include
+	//      the (empty) installed actors field if it is staying; note that currently fvm3 expects
+	//      it to be there.
 	bstore := sm.ChainStore().StateBlockstore()
 	return LiteMigration(ctx, bstore, newActorsManifestCid, root, oldv, newv, types.StateTreeVersion4, newStateTreeVersion)
 }