By: Valentin Hirschi <valentin.hirschi@gmail.com>
Add native LTD representations and stability rescue Generate CFF and LTD with ordered representation selection, complete LTD residue sums, local 4D UV composition, and per-attempt stability dispatch. Cover physical cuts and threshold counterterms, persistence and standalone evaluation, CLI diagnostics, scalar benchmarks, and overlap-center objectives. Use stock SymJIT 2.26.3 and validate the full scalar matrix and CI suite.