Optimize and fix calculate scripts

inventory-server/db/schema.sql

@@ -122,7 +122,8 @@ CREATE TABLE IF NOT EXISTS orders (
     KEY pid (pid),
     KEY customer (customer),
     KEY date (date),
-    KEY status (status)
+    KEY status (status),
+    INDEX idx_orders_metrics (pid, date, canceled)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 -- Create purchase_orders table with its indexes
@@ -152,6 +153,7 @@ CREATE TABLE purchase_orders (
     INDEX idx_status (status),
     INDEX idx_receiving_status (receiving_status),
     INDEX idx_purchase_orders_metrics (pid, date, status, ordered, received),
+    INDEX idx_po_metrics (pid, date, receiving_status, received_date),
     INDEX idx_po_product_date (pid, date),
     INDEX idx_po_product_status (pid, status),
     UNIQUE KEY unique_po_product (po_id, pid)