Throttle Decora wifi updates

[joostlek]

Proposed change

Throttle Leviton updates

So Leviton reached out and apparently there are several users who request the Leviton servers way too much. So let's throttle the update method. There are features available for Leviton so it could become a push based integration, but as it's a YAML only integration today and config flows take time, we can use this as a temporary fix to at least decrease the load.

As this is community maintained, I'd love to support people who want to migrate this and make this integration better.

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 #
• This PR is related to issue:
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• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
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To help with the load of incoming pull requests:

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[Copilot]

Pull Request Overview

This PR adds throttling to the Leviton Decora WiFi integration's update method to reduce excessive API requests to Leviton's servers. The implementation uses the @Throttle decorator with a 30-second minimum interval between update calls, serving as a temporary fix until the integration can be modernized with a config flow and push-based updates.

• Adds 30-second throttle to update() method to prevent excessive server requests
• Imports required timedelta and Throttle utilities

[Copilot]

[nitpick] Consider defining the throttle interval as a module-level constant for better maintainability and consistency with other integrations. This makes the interval easier to find and adjust if needed.

MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=30)

# Then use it in the decorator:
@Throttle(MIN_TIME_BETWEEN_UPDATES)
def update(self) -> None:

This pattern is used by most other integrations using the @Throttle decorator (e.g., arest, bbox, dovado, etc.).