Refactor + fixes

threshold sweep + TF-IDF/RF/SVM baselines, event-date KG +64 canonical events (1169->1233 facts), V8 action-before-office check, _check_event_date() in external.py

DATE_TOLERANCE 400->200, cross-entity overlap check with same_role_category filter, Reference KG +22 manual facts (Nixon/Ford/LBJ/JFK/Truman/Blair/Thatcher/Starmer/Macron/Tusk + legislation) — F1 0.345->0.393, Recall 0.227->0.273, Sep +0.129->+0.151

RSS verification panel, benchmark split (100/150), remove Ollama/REBEL from frontend, sync Qwen3 labels

RSS feeds updated + Reference KG 517->1161 facts + entity_label fix + Neo4j reconnect

Testes + refactor

Add Reference KG with 14 verified entities (presidents, companies, events)

Sprint 1: project structure