Backfill qualified lot activation selection

db/migrations/0022_backfill_stock_lot_activation_selection.sql

@@ -0,0 +1,25 @@
+BEGIN;
+
+WITH qualified AS (
+  SELECT
+    sl.id,
+    sl.product_id,
+    COUNT(*) OVER (PARTITION BY sl.product_id) AS qualified_count
+  FROM stock_lot sl
+  INNER JOIN v_stock_lot_balance v ON v.stock_lot_id = sl.id
+  WHERE sl.status = 'open'
+    AND NULLIF(TRIM(sl.lot_number), '') IS NOT NULL
+    AND sl.manufacturer_party_id IS NOT NULL
+    AND NULLIF(TRIM(sl.manufacturer_lot_number), '') IS NOT NULL
+    AND sl.mfg_date IS NOT NULL
+    AND sl.expiry_date IS NOT NULL
+    AND sl.purchase_date IS NOT NULL
+    AND v.qty_net > 0
+)
+UPDATE stock_lot sl
+SET next_active = TRUE, updated_at = NOW()
+FROM qualified q
+WHERE sl.id = q.id
+  AND q.qualified_count = 1;
+
+COMMIT;