Add a Log When Creating a UEI Validation Waiver (#4123)

* Log UEI validation waivers on addition by admin

* Fix a typo in a comment

backend/api/test_serializers.py

@@ -125,7 +125,7 @@ def test_expired_waived_uei_payload(self):
             expiration=expired["expiration"],
         )
 
-        # Invalid due to the waiver being expired. Mock the SAM call as though the entity doesnt exist.
+        # Invalid due to the waiver being expired. Mock the SAM call as though the entity does not exist.
         with patch("api.uei.SESSION.get") as mock_get:
             mock_get.return_value.status_code = 200
             mock_get.return_value.json.return_value = json.loads(missing_uei_results)

backend/audit/admin.py

@@ -262,6 +262,12 @@ class UeiValidationWaiverAdmin(admin.ModelAdmin):
     )
     readonly_fields = ("timestamp",)
 
+    def save_model(self, request, obj, form, change):
+        super().save_model(request, obj, form, change)
+        logger.info(
+            f'Validation Waiver for UEI "{obj.uei}" successfully added by user: {request.user.email}.'
+        )
+
 
 admin.site.register(Access, AccessAdmin)
 admin.site.register(DeletedAccess, DeletedAccessAdmin)