refactor(core): enhance SDK structure and documentation

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/Data/NominalAccounts/Deals/DealData.php

@@ -1,15 +1,30 @@
 <?php
+/*
+// MODULE_CONTRACT: Defines the data structure for a single deal.
+// RESPONSIBILITY: To hold and type-safely represent the core attributes of a deal, such as its ID, status, and expiration.
+// INPUTS: Raw JSON object from the API response.
+// OUTPUTS: A structured object containing deal details.
+// LINKS: DealCollectionData.php, Requests/NominalAccounts/Deals/GetDealRequest.php
+*/
 
 namespace Apoloz\AlfaBank\Data\NominalAccounts\Deals;
 
+// <SECTION name="module_imports" intent="Import the base Spatie Laravel Data class.">
+// <BELIEF_STATE "Extending `Spatie\LaravelData\Data` enables automatic casting from JSON and provides other DTO benefits.">
 use Spatie\LaravelData\Data;
+// </SECTION>
 
+// <SECTION name="class_definition" intent="Define a DTO for a single deal's details.">
+// <BELIEF_STATE "This DTO provides a comprehensive, type-safe representation of a deal, essential for consistent data handling across the SDK.">
 class DealData extends Data
 {
+    // <SECTION name="constructor_properties" intent="Define all properties that describe a deal.">
+    // <BELIEF_STATE "The constructor includes mandatory fields such as `dealId` (unique identifier), `status` (current state), `expireDate`, and `isValid` (indicating payment readiness).">
     public function __construct(
         public string $dealId,
         public string $status,
         public string $expireDate,
         public bool $isValid,
     ) {}
+    // </SECTION>
 }