By: ValentinHirschi <valentin.hirschi@gmail.com>
pin the Symbolica merge fix and record the GL638 investigation Pin Symbolica, Numerica and Graphica to the published minimal constant-merge backport a277a8dadbaae5a8d6605f2f381991a601e1f345, retaining the current API and nested tensor-sum counter fix. Keep builtin exact pi in threshold prefactors. Supply the all-orientation GL638 WH/WF metadata and common run-card blocks with named generation, sampling, stability and symmetric localization controls. Record matched full-UV soft-limit controls, signed/absolute integration results, 20-core sampling comparisons and portable numerical counterexamples. Preserve the explicit limitations at coincident A/P roots and the hard H/Z corner; ordinary-soft cancellation and improved finite-run errors are not a full cure. Validation with the public pin: formatting, unchanged Hakari output, locked workspace/all-target check, 12 focused nextest tests, focused Clippy with warnings denied, and release build pass. Fresh all-936-orientation generation and a 3,000-sample pilot pass; the pilot has no NaN or unstable samples. Both diagnostic panels (13 freshly generated state cases and 19 prior-state controls) reproduce previous numerical payloads and precision flags exactly, including the known invalid A/P evaluations. Read-only states and compiled inputs remain unchanged. Card: examples/cli/epem_a_ttxh/NNLO/epem_a_tth_NNLO_test_GL638.toml Regenerate saved integrands for the DOT/exact-pi changes; runtime controls do not require regeneration. No saved state or private research archive is committed. User request: alright, then publish your patch for now and pin against that gammaloop version. I want you to be able to commit your resulting investigation. So go ahead and do that but also summarize for me the status of GL638, I'll restart the goal then.