GeometryCalibration now performs true perspective forward/inverse
projection (with genuine keystoning) around a shared CameraModel, paired
with a CameraModelTolerance that will drive ModalFitter's per-field
fixed/refined behavior in a later task.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Full implementation of Laguerre-Gauss modal reconstruction for gyrotron
beam diagnostics, per the approved design spec, plus tests, docs, and
a runnable end-to-end example.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>