revert test

Author: guglielmo-san

tests/integration/cross_version/client_server/server_0_3.py

@@ -8,7 +8,7 @@
 
 from a2a.server.agent_execution.agent_executor import AgentExecutor
 from a2a.server.agent_execution.context import RequestContext
-from a2a.server.apps.jsonrpc import A2AFastAPIApplication
+from a2a.server.apps.jsonrpc.fastapi_app import A2AFastAPIApplication
 from a2a.server.apps.rest.fastapi_app import A2ARESTFastAPIApplication
 from a2a.server.events.event_queue import EventQueue
 from a2a.server.events.in_memory_queue_manager import InMemoryQueueManager
@@ -188,13 +188,12 @@ async def main_async(http_port: int, grpc_port: int):
     )
 
     app = FastAPI()
-    jsonrpc_app = A2AFastAPIApplication(
-        agent_card=agent_card,
-        http_handler=handler,
-        extended_agent_card=agent_card,
-    ).build()
-    app.mount('/jsonrpc', jsonrpc_app)
-
+    app.mount(
+        '/jsonrpc',
+        A2AFastAPIApplication(
+            http_handler=handler, agent_card=agent_card
+        ).build(),
+    )
     app.mount(
         '/rest',
         A2ARESTFastAPIApplication(