Sync docs for schema and metadata fields

[natoverse]

Summary

• Align input docs with current supported formats (JSONL, Parquet, MarkItDown)
• Update schema documentation for documents and text_units fields
• Clarify chunking field prepending behavior via raw_data
• Fix stale architecture/dataflow references to current data model paths
• Correct output storage field descriptions in config docs

Validation

• uv run mkdocs build -q

[natoverse]

Resolves #2416 and #2301

[Copilot]

Pull request overview

Updates GraphRAG documentation and example notebooks to match the current schema, config surface area, and supported input formats (including raw_data metadata prepending and additional readers), and refreshes notebook examples to the newer graphrag_llm APIs.

Changes:

• Align input/output schema docs with raw_data, creation_date, relationship_ids, and findings list typing.
• Expand docs to reflect additional input formats (JSONL, Parquet, MarkItDown) and update stale architecture/dataflow paths.
• Update example notebooks to use graphrag_llm model factory APIs.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
docs/index/outputs.md	Updates documented output table schemas (e.g., findings, raw_data, relationship_ids).
docs/index/inputs.md	Updates supported input format docs and explains raw_data + chunking.prepend_metadata behavior.
docs/index/default_dataflow.md	Fixes stale references to the data model folder path.
docs/index/architecture.md	Updates the “input reader” section to list current built-in readers.
docs/examples_notebooks/local_search.ipynb	Migrates LLM setup to graphrag_llm factories.
docs/examples_notebooks/global_search.ipynb	Migrates LLM setup to graphrag_llm factories; currently includes executed outputs/cell counts.
docs/examples_notebooks/global_search_with_dynamic_community_selection.ipynb	Migrates LLM setup to graphrag_llm factories.
docs/examples_notebooks/drift_search.ipynb	Migrates LLM/vector setup; currently includes warnings + saved error tracebacks.
docs/config/yaml.md	Updates YAML config docs for new input types and chunk-prepending behavior.

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