v1.0.9 Data protection audit

[sudoshi]

Roadmap execution issue derived from ROADMAP.md.

Release: v1.0.9
Category: Security
Area: Data Protection
Priority: P0
Risk: High
Work Type: Audit
Target Date: 2026-05-04

Validate data protection controls and read-only enforcement around sensitive data paths.

Scope:

• Confirm no unauthenticated route exposes PHI, PII, or clinical data.
• Audit Abby interrogation connection read-only behavior.
• Review shared cohort link token quality and time bounds.
• Validate CdmModel read-only enforcement on clinical tables.

Done Criteria

• Implementation, audit, or validation work is completed for this scope.
• Evidence is captured with code, tests, or review notes as appropriate.
• Documentation is updated when the work changes user or developer behavior.