feat(standalone): 新增单机模式，KILOSTAR_MODE=standalone 时去掉 Ray 依赖

通过 StandaloneProxy 适配层让 .remote() 调用在单机模式下透明降级为
asyncio 协程调用，7 个 Actor 和 workflow task 均可在纯 asyncio 环境运行，
启动快、资源占用低。分布式模式行为完全不变。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

kilostar/core/individual/consciousness_node/consciousness_node.py

@@ -13,8 +13,8 @@
 #  limitations under the License.
 
 
-import ray
 from typing import Union, overload
+from kilostar.utils.standalone_proxy import actor_class
 from kilostar.core.individual.consciousness_node.template import (
     ConsciousnessNodeDeps,
     ForregulatoryNode,
@@ -32,7 +32,7 @@ from kilostar.utils.ray_hook import ray_actor_hook
 from kilostar.utils.i18n import agent_prompt
 
 
-@ray.remote
+@actor_class
 class ConsciousnessNode:
     def __init__(self) -> None:
         from kilostar.utils.logger import get_logger