v4 weights: long-document robust + KLUE NER training, license → CC BY-SA 4.0

v2 weights: real-data-augmented (synthetic + KDPII). KDPII test F1 0.44 → 0.88 @ thr=0.9.

Update model card: fairer KDPII evaluation (mappable-only recall, threshold sweep)

Initial release: ko-pii-public-v1 (research, synthetic-data trained, KDPII-evaluated)

initial commit