Refactor code for consistency and readability

- Standardized string quotes across multiple files to use double quotes for consistency.
- Improved formatting of JSON dumps in mock data for better readability.
- Enhanced the structure of various functions and data definitions for clarity.
- Updated test cases to reflect changes in data structure and ensure accuracy.

watcher_visio/urls.py

@@ -14,13 +14,17 @@ Including another URLconf
     1. Import the include() function: from django.urls import include, path
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
+
 from django.conf import settings
 from django.contrib import admin
-from django.urls import path, include
+from django.urls import include, path
 from django.views.generic import RedirectView
 
 urlpatterns = [
-    path('admin/', admin.site.urls),
-    path('favicon.ico', RedirectView.as_view(url=settings.STATIC_URL + 'favicon.ico', permanent=False)),
-    path('', include('dashboard.urls')),
+    path("admin/", admin.site.urls),
+    path(
+        "favicon.ico",
+        RedirectView.as_view(url=settings.STATIC_URL + "favicon.ico", permanent=False),
+    ),
+    path("", include("dashboard.urls")),
 ]