Restructure solution layout by module

src/Scanner/StellaOps.Scanner.WebService/Services/IRedisConnectionFactory.cs

@@ -0,0 +1,13 @@
+using System.Threading;
+using System.Threading.Tasks;
+using StackExchange.Redis;
+
+namespace StellaOps.Scanner.WebService.Services;
+
+/// <summary>
+/// Abstraction for creating Redis connections so publishers can be tested without real infrastructure.
+/// </summary>
+internal interface IRedisConnectionFactory
+{
+    ValueTask<IConnectionMultiplexer> ConnectAsync(ConfigurationOptions options, CancellationToken cancellationToken);
+}