PR Template - Sprint 18 Task 01

Task

Perform full STRIDE threat model across all planes.

Summary

• Added STRIDE-based threat model coverage for Control, Runner, C2, and Vault/HSM planes.

Scope

• docs/THREAT_MODEL.md

Validation

• PYTHONPATH=src .venv/bin/pytest -q tests/qa/test_sprint18_threat_model_qa.py

Checklist

• Threat model updated
• QA test added
• Merged into dev