fix: suppress uvicorn deprecation warnings in threaded test servers

- Add warnings.filterwarnings in _run_server thread to suppress
  asyncio.iscoroutinefunction deprecation (Python 3.14+)
- Add ResourceWarning filter for unclosed sockets during teardown (Windows)
- Add pytest filterwarnings for DeprecationWarning and
  PytestUnhandledThreadExceptionWarning in pyproject.toml

Author: perhapzz

pyproject.toml

@@ -186,6 +186,12 @@ filterwarnings = [
     "ignore:Returning str or bytes.*:DeprecationWarning:mcp.server.lowlevel",
     # pywin32 internal deprecation warning
     "ignore:getargs.*The 'u' format is deprecated:DeprecationWarning",
+    # uvicorn uses asyncio.iscoroutinefunction deprecated in Python 3.14
+    "ignore:.*asyncio.iscoroutinefunction.*is deprecated:DeprecationWarning",
+    # Unclosed socket warnings during server teardown (Windows)
+    "ignore:unclosed.*socket:ResourceWarning",
+    # Thread exceptions from uvicorn deprecation warnings on Python 3.14
+    "ignore:Exception in thread.*asyncio.iscoroutinefunction:pytest.PytestUnhandledThreadExceptionWarning",
 ]
 
 [tool.markdown.lint]

tests/shared/test_streamable_http.py

@@ -451,7 +451,16 @@ def _start_server_thread(
         access_log=False,
     )
     server = uvicorn.Server(config=config)
-    thread = threading.Thread(target=server.run, daemon=True)
+
+    def _run_server():
+        import warnings
+
+        # Suppress uvicorn deprecation warnings in thread (Python 3.14+)
+        warnings.filterwarnings("ignore", message=".*asyncio.iscoroutinefunction.*is deprecated")
+        warnings.filterwarnings("ignore", category=ResourceWarning, message="unclosed.*socket")
+        server.run()
+
+    thread = threading.Thread(target=_run_server, daemon=True)
     thread.start()
     return thread, server