Add API version to Duco diagnostics for support triage

[ronaldvdmeer]

Proposed change

The Duco diagnostics payload currently only reports the device's host address, config entry data, and board info. This PR extends it so that when a user downloads diagnostics for a support request, the output also includes:

• API info (public_api_version and, when present, reported_api_version) fetched live from the device via async_get_api_info()
• Board info fields public_api_version and software_version (added in python-duco-client 0.4.0) are included when available, so the exact firmware version is visible without asking the user

Optional fields (reported_api_version, public_api_version on board, software_version on board) are only included when the device actually returns them, keeping the payload clean for older hardware.

The time field is stripped from board info because it is a raw Unix epoch timestamp that adds no value for support triage.

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 Harden Duco diagnostics for support triage ronaldvdmeer/core#18
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

python-duco-client 0.4.0 is a prerequisite; that bump was merged separately in #169776.

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 diff between library versions and ideally a link to the changelog/release notes 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 expands the Duco diagnostics payload so support downloads include more live device metadata and newer board firmware details, improving troubleshooting for this platinum-quality local integration.

Changes:

• Adds live API metadata to Duco diagnostics and includes newer board firmware/API version fields when available.
• Removes the board time value from diagnostics and keeps sensitive identifiers redacted.
• Updates Duco diagnostics fixtures, snapshot data, and connection-error coverage for the new live API call.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
homeassistant/components/duco/diagnostics.py	Extends diagnostics collection with API info and filters optional board fields.
tests/components/duco/conftest.py	Adds mock API/board data needed for the expanded diagnostics payload.
tests/components/duco/test_diagnostics.py	Updates diagnostics tests for the new payload and API-info failure path.
tests/components/duco/snapshots/test_diagnostics.ambr	Refreshes the expected diagnostics snapshot with the new fields.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

[ronaldvdmeer]

Important

Could a maintainer add the new-feature label? The CI check requires at least one of the required labels and contributors don't have permission to set labels.

[jbouwh]

LGTM,
Thanks @ronaldvdmeer 👍