Function lens_report 

pub fn lens_report(bits: &[bool]) -> LensReport

The auto-lens-finder: run every sequence lens in the arsenal against bits and report which one compresses it (covers it) and by how much — or that none do, placing it in the incompressible residue. This makes the covering explicit: each structured family is caught by its own lens, and a cryptographically-random sequence falls through all of them (the ceiling). Lenses are ordered cheapest-first so a covered sequence is recognized quickly.