Account for source-reference rounding before integration

This six-source screen and the 24-control compiled qualification are complete. Do not restart either study or reuse their unused allowances.

The point-domain test exposes a missing source-reference rounding allowance. Resolve that with a justified error bound, then check point domains, finite-difference domains and exact packet boundaries. A contradictory interval must remain an error; do not replace it with an arbitrary numerical tolerance or a branch fallback.

After those checks, connect the tighter interval at each actual packet prefix, retain all 51 parameter columns, and freeze a separate native qualification. A complete prediction comparison follows only after it passes. The usefulness target remains four of six groups; neither this screen nor the narrower source component changes that result.