Out-of-scope reply when RAG has no context

Docs: grounding off by default; claim-level path

Docs: id-only scenarios; ENABLE_TOOLS gates eval tools

Docs: evals scenario kinds + tool access vs check

Add in-app eval harness with Google Sheet-backed scenarios

Pass the full dialog into answer context

Update README to match current RAG pipeline

Point ExecChat knowledge base to the new Google Doc.

Switch to GPT-4.1 mini and reduce context token usage

Load system prompt from Google Doc and add temperature controls.

ExecChat: app_2, tools, Docker (HF-compatible, no binary files)