Add route for DxReportViewer in yarp.json

Introduce a new route configuration for `receiver-ui-envelope-dxreportviewer` in `yarp.json`.
The route matches requests to `/envelope/{EnvelopeKey}/DxReportViewer` for `GET` and `HEAD` methods.
It is part of the `receiver-ui` cluster, with an order of `90`, and includes a transformation to redirect the path to `/index.html`.
This change supports a new endpoint in the application.

EnvelopeGenerator.API/yarp.json

@@ -34,6 +34,17 @@
         { "PathSet": "/index.html" }
       ]
     },
+    "receiver-ui-envelope-dxreportviewer": {
+      "ClusterId": "receiver-ui",
+      "Order": 90,
+      "Match": {
+        "Path": "/envelope/{EnvelopeKey}/DxReportViewer",
+        "Methods": [ "GET", "HEAD" ]
+      },
+      "Transforms": [
+        { "PathSet": "/index.html" }
+      ]
+    },
     "receiver-ui-blazor-framework": {
       "ClusterId": "receiver-ui",
       "Order": 50,