createAllocation method
The default Allocation for a spawned process (ADR-0009 D6) — a
ProcessAllocation driving spawn/interpretEvent over the transport.
A one-shot (StepKind.job) is respawn-or-skip; a StepKind.daemon is
adopt-or-respawn + detach-capable. Override only for a bespoke process
effect.
Implementation
@override
Allocation createAllocation(AllocationInputs inputs) =>
ProcessAllocation(this, inputs);