feat: add acquisition API foundation

Add acquisition persistence, cost-basis calculation, seller-scoped admin routes, contracts, validation, migration, and focused application/HTTP tests.

apps/api/src/app/server.js

@@ -39,6 +39,8 @@ import { createSellerRepository } from '../modules/sellers/repositories/seller-r
 import { createPublicSellerService } from '../modules/sellers/services/public-seller-service.js';
 import { createSaleRepository } from '../modules/sales/repositories/sale-repository.js';
 import { createSaleService } from '../modules/sales/services/sale-service.js';
+import { createAcquisitionRepository } from '../modules/acquisitions/repositories/acquisition-repository.js';
+import { createAcquisitionService } from '../modules/acquisitions/services/acquisition-service.js';
 
 function parsePort(value) {
   const port = Number.parseInt(value ?? '3000', 10);
@@ -63,6 +65,7 @@ async function startServer() {
   const sellerRepository = createSellerRepository(database.db);
   const conditionRepository = createConditionRepository(database.db);
   const saleRepository = createSaleRepository(database.db);
+  const acquisitionRepository = createAcquisitionRepository(database.db);
   const userRepository = createUserRepository(database.db);
   const sessionRepository = createSessionRepository(database.db);
   const passwordResetRepository = createPasswordResetRepository(database.db);
@@ -119,6 +122,7 @@ async function startServer() {
     }),
     listingService: createListingService({ listingRepository, inventoryImageRepository }),
     saleService: createSaleService({ saleRepository }),
+    acquisitionService: createAcquisitionService({ acquisitionRepository }),
     publicListingService: createPublicListingService({ listingRepository, publicImageService }),
     productService: createProductService({ productRepository }),
     publicProductService: createPublicProductService({ productRepository }),