refactor(core): enhance SDK structure and documentation

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

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

@@ -1,13 +1,28 @@
 <?php
+/*
+// MODULE_CONTRACT: Defines the data structure for a specific amount allocated to a contractor's wallet.
+// RESPONSIBILITY: To hold and type-safely represent an amount designated for a particular wallet type (e.g., nominal, tax).
+// INPUTS: Raw JSON object or internal input.
+// OUTPUTS: A structured object containing amount and wallet type.
+// LINKS: ContractorActionRequestData.php (uses this DTO)
+*/
 
 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 an amount allocated to a contractor's wallet.">
+// <BELIEF_STATE "This DTO provides a precise, type-safe contract for specifying how funds are distributed across different wallet types for a contractor within a deal step, ensuring granular control over financial flows.">
 class ContractorAmountData extends Data
 {
+    // <SECTION name="constructor_properties" intent="Define the properties of a contractor amount allocation.">
+    // <BELIEF_STATE "The constructor includes optional fields for `walletType` (e.g., 'NOMINAL', 'TAX') and the `amount` to be allocated. Both are optional to allow for flexible usage, potentially being part of a larger distribution scheme where these properties might be inferred or contextually dependent.">
     public function __construct(
         public ?string $walletType = null,
         public ?string $amount = null,
     ) {}
+    // </SECTION>
 }