docs: repoint openevidence cache reference to reproducibility manifest (real link)

Tarjeta del modelo en español (EG) — enlaces a star-ga/hcli + hcli.pages.dev, sin marco US/hackathon

EG alignment: citation key + drop stale cross-ref

Rebrand to Historia Clínica (EG): drop US-FDA/SaMD + hackathon framing, EG context

fix: working FDA PCCP guidance URL + cleaner architecture diagram

docs: switch architecture to PNG embed (HF model cards render PNG reliably); tighten prose

add README.md (architecture diagram + Mermaid source)

docs(model card): simplify Mermaid syntax (HF-renderer-compatible — no HTML entities, single-attribute styles)

docs(model card): replace ASCII architecture with Mermaid flowchart (HF renders natively)

Initial release — BitNet b1.58 cascade (A gate + B specialist) for clinical DDI severity classification, FDA SaMD reproducibility primitive