End-to-end map: external services → providers/news layer → signal core
(engine + factory + aggregator) → SignalReport → four delivery surfaces,
plus the backtester replaying the same core. Regenerate with
venv/bin/python docs/architecture_diagram.py after architecture changes.
Claude-Session: https://claude.ai/code/session_01Aq1jZ6jBsBdEC2xT3u46SA
Harwinder Sekhon
