fix: `/invite` sys message doesn't show the inviter (#30112)

Co-authored-by: gabriellsh <40830821+gabriellsh@users.noreply.github.com>
Co-authored-by: Matheus Barbosa Silva <36537004+matheusbsilva137@users.noreply.github.com>

.changeset/sour-cows-refuse.md

+---
+"@rocket.chat/meteor": patch
+---
+
+Fixed inviter not informed when inviting member to room via `/invite` slashcommand

apps/meteor/app/slashcommands-invite/server/server.ts

 import { api } from '@rocket.chat/core-services';
 import type { IUser, SlashCommandCallbackParams } from '@rocket.chat/core-typings';
 import { Subscriptions, Users } from '@rocket.chat/models';
+import { Meteor } from 'meteor/meteor';
 
 import { i18n } from '../../../server/lib/i18n';
 import { addUsersToRoomMethod } from '../../lib/server/methods/addUsersToRoom';
@@ -57,13 +58,25 @@ slashCommands.add({
 			});
 		}
 
+		const inviter = await Users.findOneById(userId);
+
+		if (!inviter) {
+			throw new Meteor.Error('error-user-not-found', 'Inviter not found', {
+				method: 'slashcommand-invite',
+			});
+		}
+
 		await Promise.all(
 			usersFiltered.map(async (user) => {
 				try {
-					return await addUsersToRoomMethod(userId, {
-						rid: message.rid,
-						users: [user.username || ''],
-					});
+					return await addUsersToRoomMethod(
+						userId,
+						{
+							rid: message.rid,
+							users: [user.username || ''],
+						},
+						inviter,
+					);
 				} catch ({ error }: any) {
 					if (typeof error !== 'string') {
 						return;