feat: add diagnostic view and update URL routing for build probe in provider and relying party

provider/provider/urls.py

@@ -19,7 +19,7 @@ from django.contrib import admin
 from django.views.static import serve
 from django.urls import include, path, re_path
 
-from scripts.build_probe import build_probe_view
+from scripts.build_probe import build_probe_view, diag_view
 from spid_cie_oidc.entity.urls import urlpatterns as entity_urlpatterns
 
 admin.site.site_header = "OIDC Federation Provider Administration"
@@ -31,6 +31,7 @@ ADMIN_PATH = getattr(settings, 'ADMIN_PATH', 'admin/')
 urlpatterns = [
     path(f"{ADMIN_PATH}", admin.site.urls),
     path("__build", lambda request: build_probe_view("provider"), name="build_probe"),
+    path("__diag", lambda request: diag_view("provider"), name="diag_probe"),
     re_path('^static/(?P<path>.*)$',
         serve, {
             'document_root': settings.STATIC_ROOT,