feat(Structured Output Parser Node): Mark all parameters as required for schemas generated from JSON example (#15935)

packages/@n8n/nodes-langchain/utils/output_parsers/N8nStructuredOutputParser.ts

@@ -106,10 +106,14 @@ export class N8nStructuredOutputParser extends StructuredOutputParser<
 						},
 					),
 			});
-		} else {
+		} else if (nodeVersion < 1.3) {
 			returnSchema = z.object({
 				output: zodSchema.optional(),
 			});
+		} else {
+			returnSchema = z.object({
+				output: zodSchema,
+			});
 		}
 
 		return new N8nStructuredOutputParser(context, returnSchema);