feat: add unit mapping functionality

- Added new API path for unit mappings in `api_paths.dart`.
- Implemented `upsertUnitMapping` method in `ImportRepository` to handle unit mapping creation.
- Updated `ReceiptImportTab` to learn and save unit mappings during receipt import.
- Created DTO for unit mapping with validation in `create-unit-mapping.dto.ts`.
- Added SQL migration for `UnitMapping` table creation with necessary constraints.

backend/dist/inventory/inventory.service.js

@@ -16,6 +16,19 @@ const prisma_service_1 = require("../prisma/prisma.service");
 let InventoryService = class InventoryService {
     constructor(prisma) {
         this.prisma = prisma;
+        this.productWithCategoryInclude = {
+            include: {
+                categoryRef: {
+                    include: {
+                        parent: {
+                            include: {
+                                parent: true,
+                            },
+                        },
+                    },
+                },
+            },
+        };
     }
     throwInventoryItemNotFound(id) {
         throw new common_1.NotFoundException(`Inventory item with id ${id} not found`);
@@ -61,7 +74,7 @@ let InventoryService = class InventoryService {
         return this.prisma.inventoryItem.findMany({
             where,
             include: {
-                product: true,
+                product: this.productWithCategoryInclude,
             },
             orderBy,
         });
@@ -77,7 +90,7 @@ let InventoryService = class InventoryService {
                     quantity: new client_1.Prisma.Decimal(newQuantity),
                 },
                 include: {
-                    product: true,
+                    product: this.productWithCategoryInclude,
                 },
             });
             await tx.inventoryConsumption.create({
@@ -146,7 +159,7 @@ let InventoryService = class InventoryService {
                     : undefined,
             },
             include: {
-                product: true,
+                product: this.productWithCategoryInclude,
             },
         });
     }
@@ -199,7 +212,7 @@ let InventoryService = class InventoryService {
             where: { id },
             data: updateData,
             include: {
-                product: true,
+                product: this.productWithCategoryInclude,
             },
         });
     }