Why: Repeated independent semantic review required a conservative final source and analysis boundary.
Evidence: Backend 5f53f80 independent replay found no remaining Critical/Important; task-owned PostgreSQL and HTTP browser receipts identify separate fixed SHAs.
Impact: Code mechanism review is PASS, while real-model quality, exact Dev combination and platform gates remain pending.
Refs: Dev task feature/fast-slow-u2-u3-plan; Documents PR #95