88b72f76

By: ValentinHirschi <valentin.hirschi@gmail.com>

Finish sampling fixture validation and record the new GL638 launch

Align test-only cache and complete-underflow expectations with the existing
precision policy. Keep native nonzero values and complete multiplicative
factors checked, and retain promotion/overflow coverage. Archive the exact
50-worker launch and serialized runtime settings.

Validation: cargo check and strict clippy passed; the full kite fixture and
full-range reporting regression passed. Earlier GL638 and UV focused tests
and the 128-point production-card pilot also passed.

User request:
Alright then commit+push your changes (ignore agents.md restriction on waiting for nix-ci checks).
Then you can stop all gl638 active runs. And start a new one with your optimized setup with the additional channel targeting the new max-weight found.

Create a new toml card for it and it should take place in a new integration workspace, and thus be visible by:
"""
.venv/bin/python monitor_tth_nnlo_integration.py --graph gl638
"""
alongside the existing columns.