Function solve_dense_f32_cpu 

pub fn solve_dense_f32_cpu(
    cx: &mut Cx,
    problem: &InterferenceProblem,
    plane: SamplingPlane,
    phase_budget: PhaseBudget,
    tile_profile: TileProfile,
) -> Result<DenseF32Field, LoweringError>

Executes the normalized lowering through the canonical dense f32 CPU executor.

This path deliberately ignores any active environment executor. It is the portable arithmetic baseline used to compare modeled and physical providers.