Distribution_GL Initialization

Helpers/ResponseHelpers.cs

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+using General_Ledger_Service.DTOs.Common;
+
+namespace General_Ledger_Service.Services
+{
+    // Shared ApiResponse success-path builder (01_Full_Development_Plan.md Section 10.4) - removes
+    // the repeated `new ApiResponse { StatusCode = ..., Success = true, ... }` block duplicated in
+    // nearly every Service method. Does not modify ApiResponse itself (CLAUDE.md Rule 1 foundation,
+    // off-limits without asking) - this is a separate builder file that constructs one.
+    internal static class ResponseHelpers
+    {
+        public static ApiResponse Ok(string message, object? data) => new()
+        {
+            StatusCode = StatusCodes.Status200OK,
+            Success = true,
+            Message = message,
+            Data = data
+        };
+
+        public static ApiResponse Created(string message, object? data) => new()
+        {
+            StatusCode = StatusCodes.Status201Created,
+            Success = true,
+            Message = message,
+            Data = data
+        };
+    }
+}