Add PKCS#11 startup self-test health reporting

EnvelopeGenerator.Application/Common/Dto/Pkcs11SelfTestStatusDto.cs

@@ -0,0 +1,10 @@
+namespace EnvelopeGenerator.Application.Common.Dto;
+
+public sealed record Pkcs11SelfTestStatusDto(
+    bool Completed,
+    bool Success,
+    string Mode,
+    string Summary,
+    DateTimeOffset? CheckedAtUtc,
+    string? InteropError,
+    string? ToolError);