Added VoiceStore properly.

Services/DatabaseService.cs

@@ -0,0 +1,31 @@
+using HermesSocketServer.Store;
+
+namespace HermesSocketServer.Services
+{
+    public class DatabaseService : BackgroundService
+    {
+        private readonly VoiceStore _voices;
+        private readonly Serilog.ILogger _logger;
+
+        public DatabaseService(VoiceStore voices, Serilog.ILogger logger) {
+            _voices = voices;
+            _logger = logger;
+        }
+
+        protected override async Task ExecuteAsync(CancellationToken cancellationToken)
+        {
+            _logger.Information("Loading TTS voices...");
+            await _voices.Load();
+            _logger.Information("Loaded TTS voices.");
+
+            await Task.Run(async () =>
+            {
+                while (true)
+                {
+                    await Task.Delay(TimeSpan.FromMinutes(1));
+                    await _voices.Save();
+                }
+            });
+        }
+    }
+}