test(09-03): add failing tests for form locale and dropdown options

- The same cached schema must localize pl and en independently, including Accept-Language parent fallback and raw keys
- YAML option maps keep order and scalar type, and a method provider is required at boot

cabana/schema_types.go

@@ -10,6 +10,19 @@ type FormSchema struct {
 	Fields     []FormField `json:"fields"`
 }
 
+// FormView is one request's localized form, including the locale actually used.
+type FormView struct {
+	Name       string      `json:"name,omitempty"`
+	ModelClass string      `json:"modelClass,omitempty"`
+	Fields     []FormField `json:"fields"`
+	Meta       FormMeta    `json:"meta"`
+}
+
+// FormMeta reports the locale selected for a schema response.
+type FormMeta struct {
+	Locale string `json:"locale"`
+}
+
 // FormField is one Winter field in source order. JSON keys keep Winter spelling.
 type FormField struct {
 	Name        string                `json:"name"`