Document four architecture decisions that resolve violations detected by
the automated guard scan:
- ADR-049: Introduce SandboxGateway protocol in the domain layer to
eliminate resource handler imports from infrastructure (issue #8058)
- ADR-050: Canonicalize plan identifiers to ULID strings across all
application-layer services, removing integer surrogate ID leakage
(issue #8059)
- ADR-051: Decompose PlanLifecycleService (2,649 lines) into eight
focused modules each ≤500 lines, compliant with CONTRIBUTING.md
(issue #8061)
- ADR-052: Replace placeholder assert-True BDD steps with real
lifecycle assertions that verify observable behavior (issue #8062)
ISSUES CLOSED: #8058, #8059, #8061, #8062
HAL9000
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