Summary

This PR enhances the messaging infrastructure by introducing per-device delivery receipts and adding conversation and user rooms as a performance optimization layer for real-time messaging.

Changes Made

• Implemented message_delivered events to support delivery receipts on a per-device basis.
• Added conversation-based rooms to optimize message routing for active conversations.
• Added user-specific rooms to improve event targeting across a user's connected devices.
• Updated the real-time messaging flow to leverage conversation and user room membership.
• Improved event delivery efficiency by reducing unnecessary message broadcasts.

Benefits

• Provides more accurate delivery status tracking across multiple user devices.
• Improves scalability and performance by routing events only to relevant conversation and user rooms.
• Reduces unnecessary network traffic and server workload.
• Establishes a more efficient foundation for real-time messaging and future messaging features.

Closes #185
Closes #195