Added logic to only push mqtt messages when a change is outside of a range about modpoll HOT 2 OPEN

Great suggestions.

I am also considering modifying the docker configuration. I'm using Portainer, and it allows you to specify environment variables from inside that tool. I think I should add it in the contributions section as it will break the existing system.

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Yeah, that's a nice feature. Also your approach looks good to me.
Here are some points for your consideration,

1. Backwards compatibility: Current users don't have to modify their existing commands and config files for upgrade
2. The new code shall allow those additional columns in csv file to be empty if this feature is not required.
3. Consider adding two columns (low bound / high bound) to make it more generic, which can be used for abnormal detection / alarm use case. Many device vendors provide such register value range in their Modbus documents. I believe it will also cover your use case.

Your contribution is most welcome. Thanks.

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