Optimize imports, fix up tracking records and time overall

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

@@ -114,4 +114,26 @@ BEGIN
 
     RAISE NOTICE 'Finished % module. Duration: %', _module_name, clock_timestamp() - _start_time;
 
-END $$;
+END $$;
+
+-- Return metrics about the update operation for tracking
+WITH update_stats AS (
+    SELECT 
+        COUNT(*) as total_products,
+        COUNT(*) FILTER (WHERE last_calculated >= NOW() - INTERVAL '5 minutes') as rows_processed,
+        COUNT(*) FILTER (WHERE abc_class = 'A') as abc_a_count,
+        COUNT(*) FILTER (WHERE abc_class = 'B') as abc_b_count,
+        COUNT(*) FILTER (WHERE abc_class = 'C') as abc_c_count,
+        COUNT(*) FILTER (WHERE avg_lead_time_days IS NOT NULL) as products_with_lead_time,
+        AVG(avg_lead_time_days) as overall_avg_lead_time
+    FROM public.product_metrics
+)
+SELECT 
+    rows_processed,
+    total_products,
+    abc_a_count,
+    abc_b_count,
+    abc_c_count,
+    products_with_lead_time,
+    ROUND(overall_avg_lead_time, 1) as overall_avg_lead_time
+FROM update_stats;