Get product_categories inserting and product import fully running

inventory-server/db/schema.sql

@@ -62,7 +62,7 @@ CREATE TABLE products (
 
 -- Create categories table with hierarchy support
 CREATE TABLE categories (
-    cat_id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    cat_id BIGINT PRIMARY KEY,
     name VARCHAR(100) NOT NULL,
     type SMALLINT NOT NULL COMMENT '10=section, 11=category, 12=subcategory, 13=subsubcategory, 1=company, 2=line, 3=subline, 40=artist',
     parent_id BIGINT,