cstr/bert-base-NER-GGUF

docs: add provenance / EU AI Act Art. 53 note

importance matrix (calibration)

A/B summary (f1 vs gold)

iq4_xs +imatrix (f1_vs_full-precision=1.0000)

q4_k +imatrix (f1_vs_full-precision=0.9474)

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initial commit