refactor(core): enhance SDK structure and documentation

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

src/Data/NominalAccounts/Deals/Steps/StepData.php

@@ -1,11 +1,25 @@
 <?php
+/*
+// MODULE_CONTRACT: Defines the data structure for a single step within a deal.
+// RESPONSIBILITY: To hold and type-safely represent the details of a specific stage in a multi-step deal process.
+// INPUTS: Raw JSON object from the API response.
+// OUTPUTS: A structured object containing deal step details.
+// LINKS: Requests/NominalAccounts/Deals/Steps/GetStepRequest.php
+*/
 
 namespace Apoloz\AlfaBank\Data\NominalAccounts\Deals\Steps;
 
+// <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 step.">
+// <BELIEF_STATE "This DTO provides a clear, type-safe contract for a deal step, which is a critical component for defining and tracking complex business processes within a deal.">
 class StepData extends Data
 {
+    // <SECTION name="constructor_properties" intent="Define the properties of a deal step.">
+    // <BELIEF_STATE "The constructor includes key identifiers like `stepId` and `stepNumber`, along with `description`, `status`, and `isValid` to provide a comprehensive overview of the step's current state and details.">
     public function __construct(
         public string $stepId,
         public int $stepNumber,
@@ -13,4 +27,5 @@ class StepData extends Data
         public string $status,
         public bool $isValid,
     ) {}
+    // </SECTION>
 }