added timestamp for feed items

migrations/2023-10-22-115359_update_feed_item_date/down.sql

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+-- This file should undo anything in `up.sql`
+ALTER TABLE feed_item
+DROP COLUMN created_ts;

migrations/2023-10-22-115359_update_feed_item_date/up.sql

@@ -0,0 +1,6 @@
+-- Your SQL goes here
+ALTER TABLE feed_item
+ADD COLUMN created_ts TIMESTAMP;
+
+ALTER TABLE feed_item
+ALTER COLUMN created_ts SET DEFAULT now();