'send-many-messages' permission not respected when sending via Rocket.Chat.js.SDK

Description:

Sending frequent messages (more than 5/sec) using Rocket.Chat.js.SDK raises an error despite having assigned permission 'send-many-messages' to a user.

Steps to reproduce:

1. Use the bot example from https://developer.rocket.chat/v1/docs/develop-a-rocketchat-sdk-bot
2. Replace the processMessages function with:

const processMessages = async (err, message, messageOptions) => {
 if (!err) {
   if (message.u._id === myUserId) return;
   for(let i=0;i<10;i++) await driver.sendToRoomId('Hi there! - '+i, message.rid);
 }
};

3. Run node server.js and send a random message to the user.

Expected behavior:

The response shoule be 10 greetings like Hi there! - 0 with numbers from 0 to 9.

Actual behavior:

5 messages are sent and the error is returned:

[sendMessage] Error: {
  isClientSafe: true,
  error: 'too-many-requests',
  reason: 'Error, too many requests. Please slow down. You must wait 1 seconds before trying again.',
  details: { timeToReset: 425 },
  message: 'Error, too many requests. Please slow down. You must wait 1 seconds before trying again. [too-many-requests]',
  errorType: 'Meteor.Error'
}

Temporary workaround

An introduction of a send delay like this solves the issue:
for(let i=0;i<10;i++) setTimeout(async ()=>{await driver.sendToRoomId('Hi there! - '+i, message.rid)},i*200);

Server Setup Information:

• Version of Rocket.Chat Server: 7.1.0
• License Type: Starter
• Deployment Method: tar
• NodeJS Version: 20.17
• MongoDB Version: 6.0.19

Reproduce the issue with the Rocket.Chat.js.SDK bot example, replacing processMessages and running node server.js. Start by tracing driver.sendToRoomId and the server-side handling of the send-many-messages permission and request limit. Done means ten messages can be sent without the too-many-requests error when the permission is assigned, while normal limiting remains intact.