fix: improve connection timeout handling for stale peers

[MudDev]

This pull request improves the reliability and efficiency of the peer publishing mechanism in src/Site/Site.py by making peer connection freshness a key factor in both connection handling and peer selection. The main changes focus on detecting stale connections earlier and prioritizing peers with active connections, which should reduce failed publish attempts and improve network responsiveness.

Peer connection handling improvements:

• Enhanced the logic in the publisher method to detect and close stale peer connections before attempting to publish, ensuring that only fresh and active sockets are used for publishing. If a connection is stale or missing, it is closed and a longer timeout is budgeted to allow for a full reconnect.

Peer selection improvements:

• Modified the publish method to sort peers by connection freshness, so that peers with the most recent activity are prioritized for publishing. This increases the likelihood of successful publishes and reduces noise from failed attempts due to stale connections.
• Added a note and TODO regarding deduplication of peers by IP address to further reduce redundant or phantom peer entries in the future.