Starlette import changes for tests

Signed-off-by: Ed Snible <snible@us.ibm.com>

Author: esnible

tests/a2a/test_weather_secret_redaction.py

@@ -36,16 +36,19 @@ def _load_module(name: str, path: pathlib.Path):
     "langchain_core",
     "langchain_core.messages",
     "starlette",
+    "starlette.applications",
     "starlette.middleware",
     "starlette.middleware.base",
     "starlette.routing",
     "a2a",
+    "a2a.helpers",
     "a2a.server",
     "a2a.server.agent_execution",
     "a2a.server.apps",
     "a2a.server.events",
     "a2a.server.events.event_queue",
     "a2a.server.request_handlers",
+    "a2a.server.routes",
     "a2a.server.tasks",
     "a2a.types",
     "a2a.utils",