perf: harden runtime for weaker hardware

tools/benchmark_simulation_scaling.gd

@@ -74,6 +74,7 @@ func _run() -> void:
 
 	var report := {
 		"schema_version": SimulationScalingBenchmark.SCHEMA_VERSION,
+		"simulation_state_schema_version": SimulationStateRecord.SCHEMA_VERSION,
 		"captured_utc": Time.get_datetime_string_from_system(true) + "Z",
 		"engine_version": String(Engine.get_version_info().get("string", "unknown")),
 		"platform": OS.get_name(),
@@ -83,7 +84,8 @@ func _run() -> void:
 		"workload_id": String(SimulationScalingBenchmark.WORKLOAD_ID),
 		"workload":
 		(
-			"All NPCs receive full per-tick needs/task updates and ordinary action decisions; "
+			"All NPCs receive full per-tick needs/task updates, ordinary action decisions, "
+			+ "and one matching authoritative combatant record; "
 			+ "travel resolves through the deterministic immediate-arrival headless convention."
 		),
 		"timed_phases": ["simulation_tick", "headless_arrival_completion"],
@@ -130,10 +132,18 @@ func _summarize_samples(case_id: String, samples: Array[Dictionary]) -> Dictiona
 		"arrivals_processed",
 		"warmup_arrivals",
 		"npc_updates",
+		"npc_combatant_count",
+		"npc_combatant_coverage_valid",
 		"start_tick",
 		"end_tick",
 	]
 	for sample in samples:
+		if (
+			not bool(sample.get("npc_combatant_coverage_valid", false))
+			or int(sample.get("npc_combatant_count", -1)) != int(sample.get("population", -2))
+		):
+			push_error("Scaling benchmark case %s lost NPC combatant coverage" % case_id)
+			return {}
 		if String(sample["final_checksum"]) != checksum:
 			push_error("Scaling benchmark case %s diverged across checksums" % case_id)
 			return {}