Add backend changes and update scripts

inventory-server/db/schema.sql

@@ -38,8 +38,26 @@ CREATE TABLE products (
 CREATE TABLE categories (
     id BIGINT AUTO_INCREMENT PRIMARY KEY,
     name VARCHAR(100) NOT NULL,
+    description TEXT,
+    parent_category VARCHAR(100),
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
-    UNIQUE KEY unique_name (name)
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    status VARCHAR(20) DEFAULT 'active',
+    UNIQUE KEY unique_name (name),
+    INDEX idx_parent (parent_category),
+    INDEX idx_status (status)
+) ENGINE=InnoDB;
+
+-- Create vendor_details table
+CREATE TABLE vendor_details (
+    vendor VARCHAR(100) PRIMARY KEY,
+    contact_name VARCHAR(100),
+    email VARCHAR(255),
+    phone VARCHAR(50),
+    status VARCHAR(20) DEFAULT 'active',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    INDEX idx_status (status)
 ) ENGINE=InnoDB;
 
 -- Create product_categories junction table