Plan: GH-0011 QA Scrape-to-Chat

Context

This issue aims to validate the current backend stack end-to-end: scrape -> queued job -> automated ingestion -> chat -> Postman validation

Problem

We need to prove that the current working stack actually works end-to-end without introducing architectural changes.

Target state

1. Define the exact happy-path test flow in Postman.
2. Verify current endpoints and payloads.
3. Fix Postman assets if needed.
4. Document the execution procedure in docs/96_implementation/.
5. Run the strongest real validation possible.