fix: make rename migration idempotent with existence check

Author: patrickluzdev

packages/db/src/migrations/0003_rename_check_interval.sql

@@ -1 +1,8 @@
-ALTER TABLE "scrape_configs" RENAME COLUMN "check_every_hours" TO "check_interval_minutes";
+DO $$ BEGIN
+  IF EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_name = 'scrape_configs' AND column_name = 'check_every_hours'
+  ) THEN
+    ALTER TABLE scrape_configs RENAME COLUMN check_every_hours TO check_interval_minutes;
+  END IF;
+END $$;