ApiReconciliation

Frame error rate: the share of frames that converge, and the rate it leaves

4/4 passed in 1ms

Test	What it does	Result
test_fer_domain	The FER is refused outside [0, 1], and at 1 the rate is zero while the oracle rate stays positive.	✅ pass
test_fer_not_modelled	An unset FER reports as default with no value, not a measured zero, a published FER pairing with its $\beta$ and code rate (Hajomer arXiv:2305.08156 reports 0.59 beside $\beta =0.925$ on a rate-0.05 MET-LDPC).	✅ pass
test_fer_scales	A 40% frame error rate leaves 60% of the rate on both estimation paths, with $I_{AB}$, the Holevo bound and the interval untouched.	✅ pass
test_variance_sign	A negative phase-error variance is refused, not clamped: $v_{err}=-1$ would give -6.49 SNU at $V_A=5$.	✅ pass