kevm-pyk: thread step_timeout through run_prover

Adds a `step_timeout: int | None = None` parameter to `run_prover` and
forwards it to the `APRProver` constructor. `APRProver` enforces the
per-step wall-clock budget (interrupt + halve `execute_depth` + retry),
so `run_prover` only needs to pass the value through.

Default `None` keeps the prior behavior (no per-step timeout).

Author: Stevengre

kevm-pyk/src/kevm_pyk/utils.py

@@ -117,6 +117,7 @@ def run_prover(
     assume_defined: bool = False,
     extra_module: KFlatModule | None = None,
     optimize_kcfg: bool = False,
+    step_timeout: int | None = None,
 ) -> bool:
     prover: APRProver | ImpliesProver
     try:
@@ -134,6 +135,7 @@ def create_prover() -> APRProver:
                     assume_defined=assume_defined,
                     extra_module=extra_module,
                     optimize_kcfg=optimize_kcfg,
+                    step_timeout=step_timeout,
                 )
 
             def update_status_bar(_proof: Proof) -> None: