Refine local models parameters

Each local model needs to be refined to allow for precise and effective extractions:

QA: 5-ws questions (who, where, what, why, when) are not sufficiently exhaustive for info extraction. Need to implement more structured questions
ZSC: evaluate if additional specific labels evaluation could be implemented to enhance metadata extraction
SUM: try multiple max/min lengths setup, default seems to be fine too

the-needl / hf-app-fastapi