kevm-pyk: thread step_timeout through run_prover#2867
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Adds a `step_timeout: int | None = None` parameter to `run_prover` and forwards it to the `APRProver` constructor, which enforces the per-step wall-clock budget (interrupt + halve `execute_depth` + retry). `step_timeout` is only honored on the sequential `advance_proof` path; `parallel_advance_proof` does not wrap steps with the timeout budget. So when `step_timeout` is set, `run_prover` runs sequentially regardless of `force_sequential`, warning if `max_frontier_parallel > 1` that frontier parallelism is being dropped. Default `None` keeps the prior behavior (no per-step timeout, parallel path unchanged).
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Adds
step_timeouttorun_prover, forwarded toAPRProver(which enforces the per-step budget: interrupt + halveexecute_depth+ retry, see runtimeverification/k#4930).step_timeoutis only honored on the sequentialadvance_proofpath —parallel_advance_proofignores it. So whenstep_timeoutis set,run_proverruns sequentially regardless offorce_sequential, warning ifmax_frontier_parallel > 1. DefaultNoneis unchanged.Enables Kontrol's
--step-timeout. Making the parallel path honorstep_timeoutis a pyk follow-up.