[Feature] Add legacy api endpoint to mimic ReferringScenarios (#362)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#362

static/js/alpine/components/schema-form.js

@@ -88,6 +88,7 @@ document.addEventListener("alpine:init", () => {
       options.debugErrors ??
       (typeof window !== "undefined" &&
         window.location?.search?.includes("debugErrors=1")),
+    attach_object: options.attach_object || null,
 
     async init() {
       if (options.schemaUrl) {