Update calculate scripts and routes for PO table split

inventory-server/scripts/metrics-new/update_periodic_metrics.sql

@@ -24,14 +24,17 @@ BEGIN
     RAISE NOTICE 'Calculating Average Lead Time...';
     WITH LeadTimes AS (
         SELECT
-            pid,
-            AVG(GREATEST(1, (last_received_date::date - date::date))) AS avg_days -- Use GREATEST(1,...) to avoid 0 or negative days
-        FROM public.purchase_orders
-        WHERE status = 'received' -- Or potentially 'full_received' if using that status
-          AND last_received_date IS NOT NULL
-          AND date IS NOT NULL
-          AND last_received_date >= date -- Ensure received date is not before order date
-        GROUP BY pid
+            po.pid,
+            -- Calculate lead time by looking at when items ordered on POs were received
+            AVG(GREATEST(1, (r.received_date::date - po.date::date))) AS avg_days -- Use GREATEST(1,...) to avoid 0 or negative days
+        FROM public.purchase_orders po
+        -- Join to receivings table to find actual receipts
+        JOIN public.receivings r ON r.pid = po.pid
+        WHERE po.status = 'done' -- Only include completed POs
+          AND r.received_date >= po.date -- Ensure received date is not before order date
+          -- Optional: add check to make sure receiving is related to PO if you have source_po_id
+          -- AND (r.source_po_id = po.po_id OR r.source_po_id IS NULL)
+        GROUP BY po.pid
     )
     UPDATE public.product_metrics pm
     SET avg_lead_time_days = lt.avg_days::int