Pooldose additional sensors

[lmaertin]

Breaking change

Proposed change

Add chlorine and flow rate sensors to the Pooldose integration for extended device support.

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:
• Link to documentation pull request: Pooldose: additional sensor entities and extended list of supported devices home-assistant.io#41671
• 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.
• 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
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

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.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[Copilot]

Pull Request Overview

This PR adds support for chlorine-related sensors and a flow rate sensor with dynamic unit handling to the PoolDose integration. The changes expand the integration's sensor coverage to include chlorine monitoring and flow rate measurements.

Key changes:

• Added three new sensors: chlorine level (cl), chlorine dosing type, and chlorine peristaltic dosing
• Added flow rate sensor with dynamic unit support (similar to existing temperature sensor)
• Added test coverage for flow rate sensor's dynamic unit behavior

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
homeassistant/components/pooldose/sensor.py	Added sensor descriptions for cl, flow_rate, cl_type_dosing, and peristaltic_cl_dosing sensors; extended dynamic unit logic to support flow_rate
homeassistant/components/pooldose/strings.json	Added translations for new chlorine and flow rate sensors with appropriate state mappings
homeassistant/components/pooldose/icons.json	Added icon definitions for the new sensors
tests/components/pooldose/fixtures/instantvalues.json	Added fixture data for cl_type_dosing and peristaltic_cl_dosing sensors
tests/components/pooldose/test_sensor.py	Added test for flow rate sensor's dynamic unit behavior
tests/components/pooldose/snapshots/test_sensor.ambr	Added snapshots for all new sensors including entity registry and state data