Add filter-incomplete + function-calling turn-management example

A copy of ``turn-management-filter-incomplete-turns.py`` extended with
a ``get_weather(location)`` direct function. Exercises the path where
the LLM responds to a complete user turn by calling a tool — used to
reproduce (and now verify the fix for) the ``_user_speaking`` gating
bug between filter-incomplete and function calls.

scripts/evals/run-release-evals.py

@@ -242,6 +242,7 @@ TESTS_VIDEO_AVATAR = [
 
 TESTS_TURN_MANAGEMENT = [
     ("turn-management/turn-management-filter-incomplete-turns.py", EVAL_COMPLETE_TURN),
+    ("turn-management/turn-management-filter-incomplete-turns-function-calling.py", EVAL_WEATHER),
 ]
 
 TESTS_THINKING = [