feat: import messages from go version

Catalogger.Backend/Database/DatabaseConnection.cs

@@ -25,6 +25,7 @@ public class DatabaseConnection(Guid id, ILogger logger, NpgsqlConnection inner)
         IDisposable
 {
     public Guid ConnectionId => id;
+    public NpgsqlConnection Inner => inner;
     private readonly ILogger _logger = logger.ForContext<DatabaseConnection>();
     private readonly DateTimeOffset _openTime = DateTimeOffset.UtcNow;