Allow modbus "scale" to be negative.

[janiversen]

Breaking change

Proposed change

"scale" is used to scale the value and thus a positive float, however some configurations (mis)use scale to negate the value, by setting scale to -1.

Even though it was not the intended usage, it is a valid and elegant way to negate a value. This PR allows it.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
  fixes Modbus: Negative scale not allowed since introduction of HA standard number_validator #109957

• This PR is related to issue:

• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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• There is no commented out code in this PR.
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• Tests have been added to verify that the new code works.

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To help with the load of incoming pull requests:

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[joostlek]

Maybe add a test case to avoid any regression in the future

[janiversen]

Maybe add a test case to avoid any regression in the future

Good idea, added.

And I updated dev, since it seems another integration is blocking CI.

[RacerEdge]

Hi,
I used this "scale: -1" to convert the input.
Now it doesn't work. :-(
How can I implement this now?

Regards

[janiversen]

It does work ! with 2024.2.1

[RacerEdge]

oh...sorry.
when will 2024.2.1 released?

i have 24.2.0