vrfs-268: added session_removed_at to music_sessions_user_history

manifest

@@ -70,3 +70,5 @@ max_mind_isp_add_country.sql
 avatar_using_filepicker.sql
 isp_score_batch.sql
 crash_dumps.sql
+music_sessions_user_history_add_session_removed_at.sql
+

up/music_sessions_user_history_add_session_removed_at.sql

@@ -0,0 +1,2 @@
+-- add session_removed_at to track end of users music_session connection
+ALTER TABLE music_sessions_user_history ADD COLUMN session_removed_at TIMESTAMP;