Run spam check after a sucessful build (#11980)

Trigger the task to check for spam after the build succeed. It won't run
for all the projects, only for those that we suspect could be spam ;)

Requires: readthedocs/readthedocs-ext#569

Author: humitos

readthedocs/projects/tasks/builds.py

@@ -676,6 +676,14 @@ def on_success(self, retval, task_id, args, kwargs):
         # Index search data
         index_build.delay(build_id=self.data.build["id"])
 
+        # Check if the project is spam
+        if "readthedocsext.spamfighting" in settings.INSTALLED_APPS:
+            from readthedocsext.spamfighting.tasks import (  # noqa
+                spam_check_after_build_complete,
+            )
+
+            spam_check_after_build_complete.delay(build_id=self.data.build["id"])
+
         if not self.data.project.has_valid_clone:
             self.set_valid_clone()