threat-model-surface

Perform phase 3.3 deep analysis of an in-scope attack surface for a threat model. USE WHEN the orientation brief is ready and code must be read to derive the §1.7 per-input trust table and contract-dimension matrix, §1.5 no-surprise side-effects inventory, §1.4 reachability preconditions, and §1.8 output taint. Reads public entry points for contract rather than defects, timeboxes each component family, and marks…