13. Task: Document connector safety model and local Demo-Factory test setup

[smithaldon1]

Parent Epic

#206

Purpose

Document the production connector safety boundary and the local Demo-Factory validation path.

Acceptance Criteria

• Updates architecture/security docs with read-only connector defaults.
• Documents OPC-UA, MQTT, and BACnet connection profile assumptions.
• Documents local Demo-Factory endpoints as a development/test fixture, not a production dependency.
• Documents no writeback, no arbitrary tag writes, no product disposition, and no QMS/MES writeback.
• Adds learning-log summary for the connector-management direction.

Implementation Order

Step 13. Update docs throughout implementation and complete after tests and UI/API behavior settle.

Test Plan

Run docs checks if configured and manually verify links, commands, and safety language.