chore: move the go code into a subfolder

apps/api/cmd/setup/38.sql

@@ -0,0 +1,20 @@
+INSERT INTO projections.current_states (
+    instance_id
+   , projection_name
+   , last_updated
+   , sequence
+   , event_date
+   , position
+   , filter_offset
+)
+    SELECT instance_id
+         , 'projections.notifications_back_channel_logout'
+         , now()
+         , $1
+         , $2
+         , $3
+         , 0
+    FROM eventstore.events2
+        WHERE aggregate_type = 'instance'
+            AND event_type = 'instance.added'
+    ON CONFLICT DO NOTHING;