PR Template - Sprint 18 Task 04

Task

Enumerate compromised runner scenarios.

Summary

• Added STRIDE scenarios for compromised runner conditions (S2/T2/R2/I2/D2/E2).

Scope

• docs/THREAT_MODEL.md

Validation

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

Checklist

• Scenarios documented
• Zero-trust implications captured
• Merged into dev