[WIP] Investigate delayed updates in PDO chain

[Copilot]

• Analyze the PDO event emission mechanism
• Make PDO event emission asynchronous using setImmediate()
• Update tests to handle asynchronous event emission
• Run tests to verify the fix
• Test with high-frequency PDO updates (30Hz scenario)
• Document the change

Original prompt

I'm investigating a problem where somewhere in the chain of PDO updates, updates are delayed like 3 seconds, then they all come in at once (they are supposed to be 30hz in my application)

I am wondering if PDOs in this library can be delayed or if there is a queue that can back up for some reason, as in my code, the start of the chain is

device.pdo.on('pdo', (e) => this._deviceOnPdo(e));

The fact that all the messages (or most of them) do end up coming through, just all at once, tells me something somewhere is buffering them

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