feat(14.2.1-05): cover mlmarkdown, child adopt, and regen admin artifacts

MLMarkdownField and relation-child forms share the enabled-locale
inject and adopt merge; OpenAPI, types, docs, and boardwalk dist match.

Co-authored-by: Cursor <cursoragent@cursor.com>

admin/src/api/schema.d.ts

@@ -4506,6 +4506,7 @@ export interface components {
             update: components["schemas"]["cabana.MessageForms"];
         };
         "cabana.FormMeta": {
+            enabledLocales?: string[];
             locale: string;
         };
         "cabana.FormOption": {