Move StreamableHTTPTransport import to top of file

Author: maxisbey

tests/shared/test_streamable_http.py

@@ -23,7 +23,7 @@
 
 import mcp.types as types
 from mcp.client.session import ClientSession
-from mcp.client.streamable_http import streamablehttp_client
+from mcp.client.streamable_http import StreamableHTTPTransport, streamablehttp_client
 from mcp.server import Server
 from mcp.server.streamable_http import (
     MCP_PROTOCOL_VERSION_HEADER,
@@ -1612,8 +1612,6 @@ async def bad_client():
 @pytest.mark.anyio
 async def test_handle_sse_event_skips_empty_data():
     """Test that _handle_sse_event skips empty SSE data (keep-alive pings)."""
-    from mcp.client.streamable_http import StreamableHTTPTransport
-
     transport = StreamableHTTPTransport(url="http://localhost:8000/mcp")
 
     # Create a mock SSE event with empty data (keep-alive ping)