Optimize `liftOutcome` in `KleisliGenSpawn` to avoid allocation#4598

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nmichael44 wants to merge 1 commit intotypelevel:series/3.xfrom

nmichael44:AvoidAllocationOfNaturalTransformationWhenUnnecessary

Commits on May 7, 2026

Avoid FunctionK allocation in KleisliGenSpawn.liftOutcome. Replaces the mapK invocation with a direct pattern match on Outcome. This avoids allocating a new FunctionK on every invocation.
nmichael44
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