Gracefully handle socket closure.

[sesposito]

No description provided.

[Copilot]

Pull Request Overview

This PR improves WebSocket connection closure handling by implementing a graceful shutdown process that properly handles the WebSocket close handshake. The changes ensure the server waits for client acknowledgment when initiating a close operation.

• Disables the default close handler to allow custom close message processing
• Implements a timeout-based wait for client close acknowledgment when server initiates closure
• Updates logging to provide more context about the closure reason

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