feat: add location-based food storage loop

tests/simulation_state_serialization_test.gd

@@ -10,6 +10,7 @@ func _run() -> void:
 	await _test_resource_state_round_trip()
 	_test_legacy_npc_migration()
 	_test_legacy_resource_migration()
+	_test_legacy_world_storage_migration()
 	_test_schema_rejection()
 
 	if failures.is_empty():
@@ -182,6 +183,26 @@ func _test_legacy_npc_migration() -> void:
 		"Legacy NPC migration should not invent an active travel target"
 	)
 
+func _test_legacy_world_storage_migration() -> void:
+	var manager := _create_manager(55)
+	var legacy_data: Dictionary = manager.create_state_record().to_dictionary()
+	legacy_data["schema_version"] = SimulationStateRecord.LEGACY_SCHEMA_VERSION
+	legacy_data.erase("storages")
+	var migrated := SimulationStateRecord.from_dictionary(legacy_data)
+	_check(migrated != null, "World schema v1 should migrate pantry storage")
+	if migrated != null:
+		_check(
+			migrated.storages.size() == 1
+			and is_equal_approx(
+				migrated.storages[0].get_amount(
+					SimulationIds.RESOURCE_FOOD
+				),
+				manager.village.food
+			),
+			"World migration should preserve legacy village food in pantry"
+		)
+	manager.free()
+
 func _create_manager(seed_value: int) -> Node:
 	var manager: Node = load("res://simulation/SimulationManager.gd").new()
 	manager.simulation_seed = seed_value