Hosting truncates every non-factorable set on sub-8-bit layers, but a
delta large against the grid step whose truncation capture is low is
retained better by the grid than by the rank cap. apply_hosted now
returns such layers to the requantize path when rms(delta)/mean(step)
exceeds 0.30 and the sketch capture falls below 0.90, thresholds sized
on 610 calibrated modules across krea2 and anima. Both terms must
agree: a thin delta rounds away on the grid however low its capture,
and a low-rank delta hosts exactly however fat it is.
- scoped to pure non-factorable sets; factorable members, dense-combined
deltas and svd-channel checkpoints keep hosting
- factor cache entries memoize the decision through their stored
capture, so replays route without re-running the sketch
- routed layers log as info apart from the forced-fallback warning
- the fidelity CLI applies the same rule so its reports track the loader
- seven routing tests, constants module-level and test-overridable
CalamitousFelicitousness
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