Fixes channel message mark as read lagging the channel message list view

[RCGV1]

What changed?

Added an async function with debounce to handle the read message.

Why did it change?

With a large amount of messages in a channel, scrolling would be very laggy.

How is this tested?

Tested on one iPhone with my fix and another iPhone without it. I sent around 33 messages to test what would happen.

Screenshots/Videos (when applicable)

Before Fix:

RPReplay_Final1739909121.MP4

After Fix:

ScreenRecording_02-18-2025.12-09-07_1.MP4

Checklist

• My code adheres to the project's coding and style guidelines.
• I have conducted a self-review of my code.
• I have commented my code, particularly in complex areas.
• I have made corresponding changes to the documentation.
• I have tested the change to ensure that it works as intended.