MdiGuards

Out-of-domain MDI-BB84 inputs raise rather than returning a wrong number

5/5 passed in 0ms

Test	What it does	Result
test_error_slots	mdi_e11 refuses a decoy at or below its vacuum and a y11 outside [0, 1].	✅ pass
test_grid_shape	A gain grid other than nine cells (row-major, Alice's intensity as row) is refused.	✅ pass
test_intensity_order	The three intensities must decrease strictly.	✅ pass
test_rate_ordering	A single-photon-pair gain above the total gain is an inverted decoy bound and is refused, never rescaled.	✅ pass
test_yield_slots	mdi_yield refuses each efficiency, the per-gate dark probability and the misalignment outside its own domain.	✅ pass