Protocol site: engine, lenses, verdicts, ledger

[kgraph57]

Summary

• Completes the protocol page with the quality-gating mechanism: T1–T4 table, five adversarial lenses, KILL/MAJOR/MINOR/PASS score table, 15-criteria names, vitamin D worked ledger.
• CLI wraps; GitHub is a text link; MCP install line restored. EN + JA.
• Cochrane DOI stays T3. Not CDS.

Test plan

• https://kgraph57.github.io/evidentia/ shows flow then engine/adversarial/criteria/run tables
• JA twin at /ja/
• Ledger row 5 is T3, not T4