Fix default elkm1 temp units

[bdraco]

Proposed change

The yaml config uses cv.temperature_unit which mutates "F" -> "°F". The config flow conversion didn't contemplate that. We need the units in "°F" format for the config flow.

The default unit was "F" but the value needed to be "°F"

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)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example entry for configuration.yaml:

# Example configuration.yaml

Additional information

• This PR fixes or closes issue: fixes elkm1 climate entity for thermostats seems broken in 0.108.3 release #34278
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

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[bdraco]

Should be tagged for 0.108.6 if we do one

[MartinHjelmare]

It's better to implement a config entry migration handler to update the config entry data to the correct state before the integration is set up.

See eg:

core/homeassistant/components/huawei_lte/__init__.py

Lines 541 to 551 in d672eed

	async def async_migrate_entry(hass: HomeAssistantType, config_entry: ConfigEntry):
	"""Migrate config entry to new version."""
	if config_entry.version == 1:
	options = config_entry.options
	recipient = options.get(CONF_RECIPIENT)
	if isinstance(recipient, str):
	options[CONF_RECIPIENT] = [x.strip() for x in recipient.split(",")]
	config_entry.version = 2
	hass.config_entries.async_update_entry(config_entry, options=options)
	_LOGGER.info("Migrated config entry to version %d", config_entry.version)
	return True

[bdraco]

Thanks. Will look at cleaning this up once everything settles a bit more.