EPIC: Manual evidence layer

[kmosoti]

Outcome

Concepts can carry manual evidence notes and protocol caveats without becoming an automatic science updater.

Scope

• EvidenceNote model
• Evidence note service and API
• Evidence UI
• EMS local protocol caveat behavior
• Evidence status tests

Source Docs

• docs/01-requirements.md: Evidence Layer
• docs/05-decision-log.md: ADR-007

Done When

• Evidence notes can be added manually.
• EMS medication/protocol content can be marked LOCAL_PROTOCOL_DEPENDENT.
• Caveats are visible where they affect learner interpretation.