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/recipes/recipe-analysis.service.js

@@ -77,6 +77,7 @@ let RecipeAnalysisService = class RecipeAnalysisService {
         });
         const pantryProductIds = new Set(pantryItems.map((p) => p.productId));
         const userInventory = await this.prisma.inventoryItem.findMany({
+            where: { product: { ownerId: userId } },
             select: { productId: true },
         });
         const availableProductIds = new Set([
@@ -142,7 +143,7 @@ let RecipeAnalysisService = class RecipeAnalysisService {
                 };
             }
             const inventoryItems = await this.prisma.inventoryItem.findMany({
-                where: { productId: ingredient.productId },
+                where: { productId: ingredient.productId, product: { ownerId: userId } },
                 select: { quantity: true, unit: true },
             });
             const availableQuantity = this.calculateAvailableQuantity(inventoryItems, requiredUnit);