fix(a2a): use A2aAgentExecutor instead of VeAgentExecutor to successfully handler a2a session info (#281)

Co-authored-by: jinhao.2019 <[email protected]>

Author: jinhao2019

veadk/a2a/ve_a2a_server.py

@@ -19,20 +19,23 @@
 
 from veadk import Agent
 from veadk.a2a.agent_card import get_agent_card
-from veadk.a2a.ve_agent_executor import VeAgentExecutor
+from veadk.runner import Runner
 from veadk.memory.short_term_memory import ShortTermMemory
 
+from google.adk.a2a.executor.a2a_agent_executor import A2aAgentExecutor
+
 
 class VeA2AServer:
     def __init__(
         self, agent: Agent, url: str, app_name: str, short_term_memory: ShortTermMemory
     ):
         self.agent_card = get_agent_card(agent, url)
 
-        self.agent_executor = VeAgentExecutor(
-            app_name=app_name,
-            agent=agent,
-            short_term_memory=short_term_memory,
+        self.agent_executor = A2aAgentExecutor(
+            runner=Runner(
+                agent=agent,
+                app_name=app_name,
+            ),
         )
 
         self.task_store = InMemoryTaskStore()