2/n PSS2 migration - annotate all instances of date_range closed param

Summary:
no-op diff
Just add TODOs to annotate a known migration requirement that is a breaking change.

Reviewed By: irumata

Differential Revision: D64331484

fbshipit-source-id: 058bc7a741dd5f5b71f0ba4fc13185610cabe018

kats/detectors/distribution_distance_model.py

@@ -259,6 +259,7 @@ def fit_predict(
 
         total_data_df_group0 = total_data_df.rolling(
             window=str(self.window_size_sec) + "s",
+            # TODO(PythonSciMigration): migrate closed="both" -> inclusive="both"
             closed="both",
         ).agg(
             lambda rows: (