perf(simulation): keep rover command path within TTL

tests/test_simulation_worker_agent_command.py

@@ -27,6 +27,9 @@ class _Collector:
     def collect(self, run_id: str) -> dict[str, object]:
         return {"run_id": run_id, "sim_time_ns": 1_000_000_000}
 
+    def estimate_sim_time_ns(self) -> int:
+        return 1_000_000_000
+
 
 class _Controller:
     def __init__(self) -> None: