Fixing state_class for ecowitt rain sensors

[jakubcermak]

Proposed change

Fixes #159188

PR #155812 removed state class from accumulating rain sensor (weekly, hourly, last 24h, ....) because they are moving windows. However the truth is that not all rain sensor are moving windows - "last 24h" is, but not others - daily, hourly, yearly, etc.
This causes the error described in the issue.
This PR extends the list of sensor keys that are considered as "TOTAL_INCREASING", as they are not moving windows.

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 #159188

Checklist

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[home-assistant]

Hey there @pvizeli, mind taking a look at this pull request as it has been labeled with an integration (ecowitt) you are listed as a code owner for? Thanks!

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[frenck]

How does this PR differ / be a better option / compare to the existing open PR?

../Frenck

[Copilot]

Pull request overview

This PR fixes a regression where rain sensors lost their state_class attribute, which is needed for long-term statistics in Home Assistant. The previous change (PR #155812) removed state_class from all accumulating rain sensors because moving-window sensors (like "last 24h") should not have this attribute. However, this over-corrected by also removing it from non-moving-window sensors like daily, weekly, monthly, and yearly totals that reset at specific time boundaries.

Key changes:

• Adds a new constant RAIN_TOTAL_INCREASING_SENSOR_KEYS containing 14 rain sensor keys (both imperial and metric units)
• Replaces hardcoded tuple check with the new constant to determine which sensors get TOTAL_INCREASING state class
• Expands the list from 2 sensors (totalrainin, totalrainmm) to 14 sensors including event, hourly, daily, weekly, monthly, and yearly variants

Comments suppressed due to low confidence (1)

homeassistant/components/ecowitt/sensor.py:310

• This integration lacks test coverage for sensor functionality. Consider adding tests to verify that the correct state_class is applied to rain sensors, especially given the recent changes to distinguish between moving-window and non-moving-window sensors. Tests should verify that sensors in RAIN_TOTAL_INCREASING_SENSOR_KEYS receive TOTAL_INCREASING state class while other rain sensors do not.

        if sensor.key in RAIN_TOTAL_INCREASING_SENSOR_KEYS:
            description = dataclasses.replace(
                description,
                state_class=SensorStateClass.TOTAL_INCREASING,
            )

[jakubcermak]

How does this PR differ / be a better option / compare to the existing open PR?

../Frenck

as the other pr is not linked to the issue, I have to admit that I simply missed the other PR.
Anyway, this PR is meant as a simple bugfix extending existing functionality and code to resolve the issue, that's bugging me after the recent HA update because complete refactor is a longer work and this IMHO should be separated - first mitigate the issue by creating a simple fix, then larger refactor can follow.
Also it's forward compatible