VRFS-2465 added script to migrate text messages in notifications table to the new text_messages table

db/manifest

@@ -242,3 +242,4 @@ active_jam_track.sql
 bpms_on_tap_in.sql
 jamtracks_job.sql
 text_messages.sql
+text_message_migration.sql

db/up/text_message_migration.sql

@@ -0,0 +1,5 @@
+insert into text_messages(source_user_id, target_user_id, message, created_at, updated_at) (
+	select source_user_id, target_user_id, message, created_at, updated_at
+	from notifications
+	where description='TEXT_MESSAGE'
+);