Thread int32 saturation clamps from tiered settlement and video task
recompute into the consume/task logs under admin_info, so oversized or
malformed billing inputs stay auditable. Clamp negative audio duration
before token conversion and gate the saturation UI markers on admin.
Bound user-supplied count/duration parameters at request validation,
route ratio multipliers through guarded setters, and use saturating
int conversions in all quota math paths.
Remove the intermediate branch that recomputed quota from
EstimatedQuotaBeforeGroup when tieredResult is nil. This discarded the
FinalPreConsumedQuota fallback that TryTieredSettle already selected.
Now the error path simply adds tool surcharges to the passed-in
tieredQuota, preserving the existing fallback semantics.
Also removes unrelated mise.toml and adds a test covering the error
fallback with a pre-consumed quota that differs from the estimate.
CaIon