feature: 支持 MemPalace 记忆集成并优化 Agent 运行流程

- 新增 MemPalaceMemoryService 和 mempalace_tool，支持 drawer、diary、KG
  工具能力。
- 新增 MemPalace 示例、文档和单测，并完善中英文 memory 文档。
- 调整 LlmAgent 循环控制，支持通过 metadata 控制运行状态。
- 优化 A2A 长运行/鉴权事件转换和取消事件处理。
- 规范 memory/tool 输出、examples 环境变量模板，并修复相关 lint 问题。

Author: raychen911

README.md

@@ -446,7 +446,7 @@ This group helps you:
 Recommended first:
 
 - Session: [examples/session_service_with_in_memory](./examples/session_service_with_in_memory/README.md) / [examples/session_service_with_redis](./examples/session_service_with_redis/README.md) / [examples/session_service_with_sql](./examples/session_service_with_sql/README.md) / [examples/session_summarizer](./examples/session_summarizer/README.md) / [examples/session_state](./examples/session_state/README.md)
-- Memory: [examples/memory_service_with_in_memory](./examples/memory_service_with_in_memory/README.md) / [examples/memory_service_with_redis](./examples/memory_service_with_redis/README.md) / [examples/memory_service_with_sql](./examples/memory_service_with_sql/README.md) / [examples/memory_service_with_mem0](./examples/memory_service_with_mem0/README.md) / [examples/mem_0](./examples/mem_0/README.md)
+- Memory: [examples/memory_service_with_in_memory](./examples/memory_service_with_in_memory/README.md) / [examples/memory_service_with_redis](./examples/memory_service_with_redis/README.md) / [examples/memory_service_with_sql](./examples/memory_service_with_sql/README.md) / [examples/memory_service_with_mem0](./examples/memory_service_with_mem0/README.md) / [examples/memory_service_with_mempalace](./examples/memory_service_with_mempalace/README.md)
 - Knowledge: [examples/knowledge_with_documentloader](./examples/knowledge_with_documentloader/README.md) / [examples/knowledge_with_vectorstore](./examples/knowledge_with_vectorstore/README.md) / [examples/knowledge_with_rag_agent](./examples/knowledge_with_rag_agent/README.md) / [examples/knowledge_with_searchtool_rag_agent](./examples/knowledge_with_searchtool_rag_agent/README.md) / [examples/knowledge_with_prompt_template](./examples/knowledge_with_prompt_template/README.md) / [examples/knowledge_with_custom_components](./examples/knowledge_with_custom_components/README.md)
 
 Related docs:

README.zh_CN.md

@@ -447,7 +447,7 @@ skill_tool_set = SkillToolSet(repository=repository, run_tool_kwargs=tool_kwargs
 建议先看：
 
 - Session：[examples/session_service_with_in_memory](./examples/session_service_with_in_memory/README.md) / [examples/session_service_with_redis](./examples/session_service_with_redis/README.md) / [examples/session_service_with_sql](./examples/session_service_with_sql/README.md) / [examples/session_summarizer](./examples/session_summarizer/README.md) / [examples/session_state](./examples/session_state/README.md)
-- Memory：[examples/memory_service_with_in_memory](./examples/memory_service_with_in_memory/README.md) / [examples/memory_service_with_redis](./examples/memory_service_with_redis/README.md) / [examples/memory_service_with_sql](./examples/memory_service_with_sql/README.md) / [examples/memory_service_with_mem0](./examples/memory_service_with_mem0/README.md) / [examples/mem_0](./examples/mem_0/README.md)
+- Memory: [examples/memory_service_with_in_memory](./examples/memory_service_with_in_memory/README.md) / [examples/memory_service_with_redis](./examples/memory_service_with_redis/README.md) / [examples/memory_service_with_sql](./examples/memory_service_with_sql/README.md) / [examples/memory_service_with_mem0](./examples/memory_service_with_mem0/README.md) / [examples/memory_service_with_mempalace](./examples/memory_service_with_mempalace/README.md)
 - Knowledge：[examples/knowledge_with_documentloader](./examples/knowledge_with_documentloader/README.md) / [examples/knowledge_with_vectorstore](./examples/knowledge_with_vectorstore/README.md) / [examples/knowledge_with_rag_agent](./examples/knowledge_with_rag_agent/README.md) / [examples/knowledge_with_searchtool_rag_agent](./examples/knowledge_with_searchtool_rag_agent/README.md) / [examples/knowledge_with_prompt_template](./examples/knowledge_with_prompt_template/README.md) / [examples/knowledge_with_custom_components](./examples/knowledge_with_custom_components/README.md)
 
 相关文档：