feat: define action completion costs

tests/food_storage_loop_test.gd

@@ -204,6 +204,16 @@ func _test_wood_work_requires_material() -> void:
 		),
 		"Patrol should not consume partial wood or create safety when its full cost cannot be paid"
 	)
+	var blocked_events: Array[EconomicEventRecord] = manager.get_npc_events(npc.id, 2)
+	_check(
+		(
+			not blocked_events.is_empty()
+			and StringName(blocked_events[0].data["event_type"])
+			== SimulationIds.EVENT_TASK_BLOCKED
+			and "needs 1 Wood" in String(blocked_events[0].data.get("action_name", ""))
+		),
+		"An unpaid completion cost should create a readable blocked-task fact"
+	)
 
 	manager.add_wood(1.5)
 	_check(