[Feature Request]: Doc improvement, add a GraphRAG specific failure mode checklist and debug guide

Do you need to file an issue?

• I have searched the existing issues and this feature is not already filed.
• My model is hosted on OpenAI or Azure. If not, please look at the "model providers" issue and don't file a new one here.
• I believe this is a legitimate feature request, not just a question. If this is a question, please use the Discussions area.

Is your feature request related to a problem? Please describe.

Hi maintainers,

GraphRAG pipelines introduce additional failure surfaces beyond classic RAG, such as entity linking errors, graph construction skew, path based retrieval collapse, and context assembly issues.

Proposal (doc only, minimal):

1. A short “GraphRAG Failure Modes” checklist, focused on practical symptoms and quick checks
2. A “Debug Playbook” section, example: entity mismatch, graph fragmentation, wrong path retrieval, missing grounding, overconfident generation

This is intended to help users debug faster and report higher quality issues.

If you like the idea, I can submit a PR with an initial doc page that follows your current documentation style. Which directory would you prefer?

Describe the solution you'd like

No response

Additional context

No response