Related Issues

• failing Test Python snippets in docs after v3 branch on main: https://github.com/deepset-ai/haystack/actions/runs/29305585935

Proposed Changes:

• fix some buggy code snippets
• expand some snippets of them to make them runnable
• install a missing dependency for LLMMessagesRouter example
• skip testing some snippets where making them actually runnable would have produced a long and unclear snippet

How did you test it?

I locally ran:

hatch run docs
hatch -e test env run -- pip install huggingface-api-haystack
hatch -e test env run -- python docs-website/scripts/test_python_snippets.py --verbose tmp_api_reference/

Checklist

• I have read the contributors guidelines and the code of conduct.
• I have updated the related issue with new insights and changes.
• I have added unit tests and updated the docstrings.
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test: and added ! in case the PR includes breaking changes.
• I have documented my code.
• I have added a release note file, following the contributors guidelines.
• I have run pre-commit hooks and fixed any issue.