Fix utility_meter on DST changes

[dgomes]

Breaking change

Proposed change

Due to an underlying unsolved bug in croniter corpusops/croniter#1 that affects DST changes, this PR moves to cronsim.

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 Utility meter with monthly reset resetted one hour too early #114547
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.

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[epenet]

What is this testing?
The test passes locally even without the new dependency and without the code changes.
I would expect the tests to fail without the dependency/code changes, and pass with the dependency/code changes.

[dgomes]

I was targeting the situation in #129504 which I'm failing to replicate :(

Ended up refactoring the code a bit and updating the dependency instead

[dgomes]

>>> import pytz
>>> tz = pytz.timezone("Europe/Berlin")
>>> schedule = croniter("0 0 * * *", tz.localize(datetime(2024, 10, 26, 23, 59)))
>>> schedule.next(datetime)
datetime.datetime(2024, 10, 27, 0, 0, tzinfo=<DstTzInfo 'Europe/Berlin' CEST+2:00:00 DST>)
>>> schedule.next(datetime)
datetime.datetime(2024, 10, 28, 0, 0, tzinfo=<DstTzInfo 'Europe/Berlin' CET+1:00:00 STD>)

This actually works standalone

[dgomes]

One possibility is to change to https://github.com/cuu508/cronsim

[frenck]

Nice! Thanks, @dgomes 👍

../Frenck