Implement Inventory Management System for Accounting Application

[sweep-ai]

This pull request was created by Sweep to resolve the following request by @curtisdelicata:

Description: Add inventory tracking functionality for businesses with physical goods.

Tasks:
Create InventoryItem model and migration.
Implement UI for adding and managing inventory items.
Link inventory changes to sales and purchase orders.
Acceptance Criteria:
Users can track and manage inventory levels.
Inventory is automatically updated based on sales and purchases.

Continue chatting at https://sweep-chat-demo.vercel.app/c/1be6e3ba-b62b-4f73-a54f-3ef06da06a9d.

Purpose

Introduce a comprehensive inventory management system to enhance tracking, valuation, and monitoring of inventory items within the accounting application.

Description

This pull request adds a complete inventory management solution with the following key features:

• Create inventory items with detailed attributes like SKU, price, quantity, and reorder points
• Track inventory transactions for purchases, sales, and adjustments
• Automatically update inventory quantities based on transactions
• Provide services for inventory tracking, low stock detection, and total inventory valuation

The implementation includes:

• New database migrations for inventory_items and inventory_transactions tables
• Model definitions for InventoryItem and InventoryTransaction
• Updates to the Transaction model to support inventory tracking
• A dedicated InventoryService for managing inventory-related operations

Summary

• Added new models: InventoryItem, InventoryTransaction
• Created database migrations for inventory tables
• Implemented InventoryService with methods for:
  • Creating inventory transactions
  • Checking low stock items
  • Calculating total inventory value
• Extended Transaction model with inventory-related functionality
• Established relationships between Transaction, InventoryItem, and InventoryTransaction