add db models, refactor json models, add references in migrations

internal/foundry/models/json/errors.go

@@ -0,0 +1,8 @@
+package json
+
+import "errors"
+
+var (
+	ErrorSetupMoreThanOne = errors.New("Passed more than one setupData")
+	ErrorSetupNotFound    = errors.New("Not found setup data from your request")
+)