Struct OrbitPenaltyOperator 

pub struct OrbitPenaltyOperator {
    pub apply: Box<dyn Fn(ArrayView2<'_, f64>, ArrayView2<'_, f64>) -> Array1<f64> + Send + Sync>,
    pub stiffness_sq: f64,
}

The penalty/prior channel of the exact certificate: an operator returning the penalty curvature root’s image of an orbit direction (δB, δt), together with its stiffness scale σ_max². With exact orbits the data can never pin a model-class symmetry (the LS-compensated motion is a data-null by construction for closed bases), so all pinning of such symmetries flows through this channel — exactly where the #981 gauge-reduction ladder says identification lives (the isometry pin does the collapsing, rungs 2 and 4, in whichever metric it is computed). None ⇒ no pin installed on this atom; the orbit’s verdict is then decided by the data residual alone.

Fields

apply: Box<dyn Fn(ArrayView2<'_, f64>, ArrayView2<'_, f64>) -> Array1<f64> + Send + Sync>

Maps an orbit direction (δB (M, p), δt (n, latent_dim)) to the penalty curvature root’s image (any length); the penalty cost along the direction is the squared norm of the image.

stiffness_sq: f64

σ_max² of the penalty curvature root — the stiffness scale the orbit’s penalty cost is reported relative to (the same relative-curvature convention as the frame certificate).