From 19d973b63bc6c06cb40efac52b2f008d3844f1fa Mon Sep 17 00:00:00 2001
From: Claude Code <kjh2064@gmail.com>
Date: Mon, 3 Aug 2026 14:51:47 +0900
Subject: [PATCH] Slice A3b: Convert InitiateShadowRunRequest to class with
 JsonPropertyName

- Change from record to class (better JsonPropertyName support)
- Add [JsonPropertyName] attributes for camelCase JSON deserialization
- Properties: modelId, windowStart, windowEnd, phaseFilter
- Resolves 400 Bad Request validation failures

Source: FastEndpoints + System.Text.Json deserialization best practice
Decision: Class-based DTO with explicit property mapping

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
---
 .../Features/ShadowRun/Request.cs             | 23 +++++++++++--------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/KArtSell.Host/Features/ShadowRun/Request.cs b/src/KArtSell.Host/Features/ShadowRun/Request.cs
index 8ede0b25..cc533bf7 100644
--- a/src/KArtSell.Host/Features/ShadowRun/Request.cs
+++ b/src/KArtSell.Host/Features/ShadowRun/Request.cs
@@ -5,12 +5,17 @@ namespace KArtSell.Host.Features.ShadowRun;
 /// <summary>
 /// Initiate a 252+ trading-day model validation run.
 /// </summary>
-public sealed record InitiateShadowRunRequest(
-    [property: JsonPropertyName("modelId")]
-    Guid ModelId,
-    [property: JsonPropertyName("windowStart")]
-    DateOnly WindowStart,
-    [property: JsonPropertyName("windowEnd")]
-    DateOnly WindowEnd,
-    [property: JsonPropertyName("phaseFilter")]
-    string PhaseFilter = "All");
+public sealed class InitiateShadowRunRequest
+{
+    [JsonPropertyName("modelId")]
+    public Guid ModelId { get; set; }
+
+    [JsonPropertyName("windowStart")]
+    public DateOnly WindowStart { get; set; }
+
+    [JsonPropertyName("windowEnd")]
+    public DateOnly WindowEnd { get; set; }
+
+    [JsonPropertyName("phaseFilter")]
+    public string PhaseFilter { get; set; } = "All";
+}