fix(host): #678.6 build the role-overlay suffix from plain roles only; audit overlays; driver overlay Opc.Ua Debug -> Information

src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs

@@ -90,8 +90,9 @@ builder.WebHost.UseStaticWebAssets();
 builder.Host.UseWindowsService(options => options.ServiceName = "OtOpcUaHost");
 
 // Per-role appsettings overlay: appsettings.{role}.json (single role) or appsettings.admin-driver.json
-// (both). Optional — base appsettings.json carries enough to boot if these don't exist.
-var roleSuffix = roles.Count == 0 ? null : string.Join('-', roles.OrderBy(r => r, StringComparer.Ordinal));
+// (both). Optional — base appsettings.json carries enough to boot if these don't exist. Built from the
+// PLAIN roles only (#678.6): a cluster-{ClusterId} role in the name pointed at a file that never exists.
+var roleSuffix = RoleOverlay.Suffix(roles);
 if (roleSuffix is not null)
 {
     builder.Configuration.AddJsonFile($"appsettings.{roleSuffix}.json", optional: true, reloadOnChange: true);