Builds the one missing safeguard from the 4-blueprint integration audit:
the mirror-inversion protection (core_ha §5.2: sgn(∫⟨ψ I₅ ψ̃⟩₀) = const).
The chiral charge was a verified non-vacuous READOUT, but goldtether took
abs(), discarding the sign — orientation was measured, never enforced.
- core/physics/chiral_gate.py: ChiralOrientationGate latches sgn(Q) on the
first non-vacuous reading (|Q| >= 0.1 floor); a materially re-emerging
flip raises ChiralOrientationError (fail-closed; a sign flip is
unreachable under rotor transport, so it evidences corruption).
Even field-states stay vacuous — no orientation fabricated, no #19
revival; the gate is behaviorally inert on today's serve path.
- goldtether_residual now feeds the SIGNED charge to the gate; the
residual term keeps magnitude-only semantics byte-identical (pinned).
- Docs: integration-plan missing-piece row -> BUILT; fidelity ledger §12
gains the failable pin row.
TDD RED->GREEN. [Verification]: smoke suite passed locally (141s, 175
passed); gate suite 7 passed; goldtether-consumer regression 99 passed.
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