Fix ForwardRef._evaluate() missing type_params for Python 3.14+

Python 3.14 added a new 'type_params' parameter to ForwardRef._evaluate()
(PEP 695). Failing to pass it triggers a DeprecationWarning, which is
treated as error by FastAPI's test suite (-W error). Pass type_params=()
on Python 3.14+ to silence the warning.

fastapi/dependencies/utils.py

@@ -278,7 +278,12 @@ def _resolve_forward_ref_lenient(
             return Any
 
     localns = _LenientNamespace(globalns)
-    result = fwd_ref._evaluate(globalns, localns, recursive_guard=set())
+    if sys.version_info >= (3, 14):
+        result = fwd_ref._evaluate(
+            globalns, localns, recursive_guard=set(), type_params=()
+        )
+    else:
+        result = fwd_ref._evaluate(globalns, localns, recursive_guard=set())
     return result