feat: standardize timeout values to floats in seconds (#1766)

tests/shared/test_session.py

@@ -270,12 +270,10 @@ async def test_response_id_non_numeric_string_no_match():
         async def make_request(client_session: ClientSession):
             try:
                 # Use a short timeout since we expect this to fail
-                from datetime import timedelta
-
                 await client_session.send_request(
                     ClientRequest(types.PingRequest()),
                     types.EmptyResult,
-                    request_read_timeout_seconds=timedelta(seconds=0.5),
+                    request_read_timeout_seconds=0.5,
                 )
                 pytest.fail("Expected timeout")  # pragma: no cover
             except McpError as e:

tests/shared/test_streamable_http.py

@@ -9,7 +9,6 @@ import multiprocessing
 import socket
 import time
 from collections.abc import Generator
-from datetime import timedelta
 from typing import Any
 from unittest.mock import MagicMock
 
@@ -2370,8 +2369,8 @@ async def test_streamable_http_transport_deprecated_params_ignored(basic_server:
         transport = StreamableHTTPTransport(  # pyright: ignore[reportDeprecated]
             url=f"{basic_server_url}/mcp",
             headers={"X-Should-Be-Ignored": "ignored"},
-            timeout=999,
-            sse_read_timeout=timedelta(seconds=999),
+            timeout=999.0,
+            sse_read_timeout=999.0,
             auth=None,
         )