feat(products): add find by id method in product service

This commit introduces a new `findById` asynchronous method in the `ProductsService`. This aims to fetch specific product details using product ID from the `ProductsTable`. Additionally, `ProductsService` is exported in the products module.

src/products/products.module.ts

@@ -7,6 +7,7 @@ import { CredentialsModule } from "src/credentials/credentials.module";
 @Module({
   imports: [DrizzleModule, CredentialsModule],
   controllers: [ProductsController],
-  providers: [ProductsService]
+  providers: [ProductsService],
+  exports: [ProductsService]
 })
 export class ProductsModule {}

src/products/products.service.ts

@@ -3,6 +3,7 @@ import { DrizzleService } from "src/drizzle/drizzle.service";
 import { ProductsTable } from "src/schema";
 import { CreateProductDto, EditProductDto } from "src/products/products.dto";
 import { countDistinct, eq } from "drizzle-orm";
+import * as console from "node:console";
 
 @Injectable()
 export class ProductsService {
@@ -11,6 +12,17 @@ export class ProductsService {
     private db: DrizzleService,
   ) {}
 
+  async findById(productId:string) {
+    const res = await this.db.use()
+      .select()
+      .from(ProductsTable)
+      .where(eq(ProductsTable.uuid, productId))
+      .prepare("findProductById")
+      .execute();
+    console.log(`Fetching product n°${productId} ...\n`, res)
+    return res[0];
+  }
+
   async add(data: CreateProductDto) {
     try {
       const res = await this.db.use()