feat(planner): run a live retune sweep through DGDR v1beta2 Requests

components/src/dynamo/planner/retune/live/__init__.py

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""Live retune: run the retune sweep through DGDR v1beta2 and apply the winner.
+
+The replay retune loop (``RetuneController`` and ``_decide``) is unchanged;
+this package supplies its live pieces: the DGDR sweep executor, the
+supervisor that owns leadership and persisted state, the router actuator,
+the reconciler and the trace window cutter. ``contracts`` holds the types
+they share.
+"""