feat: complete legacy UI and playout parity migration

tools/MBN_STOCK_WEBVIEW.DbWriteSmoke/SmokeRunIdentity.cs

@@ -0,0 +1,55 @@
+#nullable enable
+
+using System.Globalization;
+
+namespace MBN_STOCK_WEBVIEW.DbWriteSmoke;
+
+internal sealed record SmokeRunIdentity(string BaseName)
+{
+    internal const string Prefix = "MBW";
+
+    private static readonly IReadOnlyDictionary<string, char> ScenarioCodes =
+        new Dictionary<string, char>(StringComparer.Ordinal)
+        {
+            ["G_PIE"] = 'P',
+            ["G_GROW"] = 'G',
+            ["G_SELL"] = 'S',
+            ["G_PROFIT"] = 'O',
+            ["PLAYLIST"] = 'L',
+            ["THEME_KRX"] = 'K',
+            ["THEME_NXT"] = 'N',
+            ["EXPERT"] = 'E'
+        };
+
+    internal static SmokeRunIdentity Create(DateTimeOffset utcNow, Guid nonce)
+    {
+        if (nonce == Guid.Empty)
+        {
+            throw new ArgumentException("A non-empty smoke nonce is required.", nameof(nonce));
+        }
+
+        var utc = utcNow.ToUniversalTime();
+        var timestamp = utc.ToString("yyMMdd", CultureInfo.InvariantCulture);
+        var suffix = nonce.ToString("N", CultureInfo.InvariantCulture)[..10]
+            .ToUpperInvariant();
+        return new SmokeRunIdentity(Prefix + timestamp + suffix);
+    }
+
+    internal string For(string suffix)
+    {
+        if (!ScenarioCodes.TryGetValue(suffix, out var scenarioCode))
+        {
+            throw new ArgumentException("The smoke identity suffix is invalid.", nameof(suffix));
+        }
+
+        var value = BaseName + scenarioCode;
+        if (value.Length != 20 ||
+            value.Any(static character =>
+                !(character is >= 'A' and <= 'Z' or >= '0' and <= '9')))
+        {
+            throw new InvalidOperationException("The smoke identity is outside its closed boundary.");
+        }
+
+        return value;
+    }
+}