feat: implement business pricing service and money utilities

- Added `businessPricing.service.js` to handle business customer pricing logic.
- Introduced `money.js` for money parsing, formatting, and calculations.
- Created `pricing.service.js` to manage variant quoting and promotion application.
- Updated validation schemas in `catalogue.schemas.js` and `inventoryMerchandising.schemas.js` for new pricing and inventory features.
- Implemented cron job for inventory reservation expiry in `inventoryReservationExpiry.cron.js`.
- Created database migrations for catalogue and inventory structures.
- Added unit tests for catalogue localization, validation, and inventory merchandising functionalities.

tests/unit/inventory-merchandising.permissions.test.js

@@ -0,0 +1,2 @@
+const {checkPermission}=require("../../app/middleware/permission.middleware");
+describe("Phase 5 permission boundaries",()=>{test("denies an authenticated customer without inventory permission",()=>{const req={user:{accountType:"CUSTOMER",permissions:[]},method:"POST"},res={status:jest.fn().mockReturnThis(),json:jest.fn()},next=jest.fn();checkPermission("inventory.adjust",{custom:true})(req,res,next);expect(res.status).toHaveBeenCalledWith(403);expect(next).not.toHaveBeenCalled();});test("allows explicit permission",()=>{const req={user:{accountType:"ADMIN",permissions:["pricing.business.manage"]},method:"POST"},res={},next=jest.fn();checkPermission("pricing.business.manage",{custom:true})(req,res,next);expect(next).toHaveBeenCalled();});});