Refactor + fixes

Replace Ollama/llama3 with spacy-llm + Qwen3-1.7B (Pipeline B + Explainer), archive REBEL (F1=0.038), fix TCS n_claims=0 score, add ISOT/RAGuard eval scripts, update start.sh and requirements

Testes + refactor

New translation

Suite pytest 33 teste C1→C4 + orchestrator (mock Ollama/Neo4j)

Sprint 1: project structure