Restructure solution layout by module

src/Scanner/StellaOps.Scanner.WebService/Domain/ScanSubmission.cs

@@ -0,0 +1,13 @@
+using System.Collections.Generic;
+
+namespace StellaOps.Scanner.WebService.Domain;
+
+public sealed record ScanSubmission(
+    ScanTarget Target,
+    bool Force,
+    string? ClientRequestId,
+    IReadOnlyDictionary<string, string> Metadata);
+
+public sealed record ScanSubmissionResult(
+    ScanSnapshot Snapshot,
+    bool Created);