fix: LLMMetadataExtractor serialisation

[davidsbatista]

Proposed Changes:

• fix serialization

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I 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:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 11935729198

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

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Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 33 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-7.7%) to 81.899%

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Files with Coverage Reduction	New Missed Lines	%
components/tools/tool_invoker.py	1	93.67%
components/tools/openai/function_caller.py	2	92.86%
components/tools/openapi/openapi_tool.py	3	58.43%
components/extractors/llm_metadata_extractor.py	5	63.64%
components/generators/chat/openai.py	22	88.48%

Totals
Change from base Build 11924112494:	-7.7%
Covered Lines:	2303
Relevant Lines:	2812

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💛 - Coveralls

[sjrl]

Hey @davidsbatista I think we are also missing page_range in the to_dict method as well.

[sjrl]

Looks good!