fix(core-typings): fix MessageAttachment oneOf discrimination for quote attachments

- Make message_link required in MessageQuoteAttachment (serves as
  discriminator for AJV oneOf)
- Patch MessageAttachmentDefault schema at runtime to add
  additionalProperties: false, preventing it from matching every
  attachment type in the oneOf

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ggazzo

apps/meteor/app/api/server/ajv.ts

@@ -3,6 +3,13 @@ import { ajv, ajvQuery } from '@rocket.chat/rest-typings';
 
 const components = schemas.components?.schemas;
 if (components) {
+	// Patch MessageAttachmentDefault to reject unknown properties so the oneOf
+	// discriminator works correctly (otherwise it matches every attachment).
+	const mad = components.MessageAttachmentDefault;
+	if (mad && typeof mad === 'object' && 'type' in mad) {
+		(mad as Record<string, unknown>).additionalProperties = false;
+	}
+
 	for (const key in components) {
 		if (Object.prototype.hasOwnProperty.call(components, key)) {
 			const uri = `#/components/schemas/${key}`;

packages/core-typings/src/IMessage/MessageAttachment/MessageQuoteAttachment.ts

@@ -7,7 +7,7 @@ export type MessageQuoteAttachment = {
 	author_name: string;
 	author_link?: string;
 	author_icon: string;
-	message_link?: string;
+	message_link: string;
 	text: string;
 	md?: Root;
 	attachments?: Array<MessageAttachment>; // TODO this is causing issues to define a model, see @ts-expect-error at apps/meteor/app/api/server/v1/channels.ts:274