Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

location/admin.py

@@ -9,40 +9,59 @@ from .models import Location
 #
 # This admin interface is kept for data migration and cleanup purposes only.
 
+
 @admin.register(Location)
 class LocationAdmin(admin.ModelAdmin):
-    list_display = ('name', 'location_type', 'city', 'state', 'country', 'created_at')
-    list_filter = ('location_type', 'country', 'state', 'city')
-    search_fields = ('name', 'street_address', 'city', 'state', 'country')
-    readonly_fields = ('created_at', 'updated_at', 'content_type', 'object_id')
-    
+    list_display = (
+        "name",
+        "location_type",
+        "city",
+        "state",
+        "country",
+        "created_at",
+    )
+    list_filter = ("location_type", "country", "state", "city")
+    search_fields = ("name", "street_address", "city", "state", "country")
+    readonly_fields = ("created_at", "updated_at", "content_type", "object_id")
+
     fieldsets = (
-        ('⚠️ DEPRECATED MODEL', {
-            'description': 'This model is deprecated. Use domain-specific location models instead.',
-            'fields': (),
-        }),
-        ('Basic Information', {
-            'fields': ('name', 'location_type')
-        }),
-        ('Geographic Coordinates', {
-            'fields': ('latitude', 'longitude')
-        }),
-        ('Address', {
-            'fields': ('street_address', 'city', 'state', 'country', 'postal_code')
-        }),
-        ('Content Type (Read Only)', {
-            'fields': ('content_type', 'object_id'),
-            'classes': ('collapse',)
-        }),
-        ('Metadata', {
-            'fields': ('created_at', 'updated_at'),
-            'classes': ('collapse',)
-        })
+        (
+            "⚠️ DEPRECATED MODEL",
+            {
+                "description": "This model is deprecated. Use domain-specific location models instead.",
+                "fields": (),
+            },
+        ),
+        ("Basic Information", {"fields": ("name", "location_type")}),
+        ("Geographic Coordinates", {"fields": ("latitude", "longitude")}),
+        (
+            "Address",
+            {
+                "fields": (
+                    "street_address",
+                    "city",
+                    "state",
+                    "country",
+                    "postal_code",
+                )
+            },
+        ),
+        (
+            "Content Type (Read Only)",
+            {
+                "fields": ("content_type", "object_id"),
+                "classes": ("collapse",),
+            },
+        ),
+        (
+            "Metadata",
+            {"fields": ("created_at", "updated_at"), "classes": ("collapse",)},
+        ),
     )
 
     def get_queryset(self, request):
-        return super().get_queryset(request).select_related('content_type')
-    
+        return super().get_queryset(request).select_related("content_type")
+
     def has_add_permission(self, request):
         # Prevent creating new generic Location objects
         return False