refactor(core): enhance SDK structure and documentation

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

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

@@ -1,13 +1,27 @@
 <?php
+/*
+// MODULE_CONTRACT: Defines the data structure for a contractor associated with a deal step.
+// RESPONSIBILITY: To hold and type-safely represent details of a beneficiary acting as a contractor within a specific deal step.
+// INPUTS: Raw JSON object from the API response.
+// OUTPUTS: A structured object containing contractor details for a deal step.
+// LINKS: Requests/NominalAccounts/Deals/Steps/GetStepContractorsRequest.php
+*/
 
 namespace Apoloz\AlfaBank\Data\NominalAccounts\Deals\Steps;
 
+// <SECTION name="module_imports" intent="Import necessary DTOs and Spatie Laravel Data components.">
+// <BELIEF_STATE "This DTO uses `ContractorAmountData` within a collection, requiring `DataCollectionOf` for type safety.">
 use Spatie\LaravelData\Attributes\DataCollectionOf;
 use Spatie\LaravelData\Data;
 use Spatie\LaravelData\DataCollection;
+// </SECTION>
 
+// <SECTION name="class_definition" intent="Define a DTO for a contractor in a deal step.">
+// <BELIEF_STATE "This DTO provides a clear, type-safe contract for contractor details, including their role, associated amounts, and other relevant information within the context of a deal step.">
 class StepContractorData extends Data
 {
+    // <SECTION name="constructor_properties" intent="Define the properties of a step contractor.">
+    // <BELIEF_STATE "The constructor includes the `beneficiaryId`, `role` (e.g., 'DEBTOR', 'CREDITOR'), `amount`, `purpose`, `requisiteId`, and `keepOnNominalAccount` flag. The `amounts` property, if present, is a collection of `ContractorAmountData` for detailed amount distribution.">
     public function __construct(
         public ?string $beneficiaryId = null,
         public ?string $role = null,
@@ -18,4 +32,5 @@ class StepContractorData extends Data
         #[DataCollectionOf(ContractorAmountData::class)]
         public ?DataCollection $amounts = null,
     ) {}
+    // </SECTION>
 }