Fix critical bugs in app_urls

- init_db.py: parameterize SQL queries to prevent SQL injection
- scheduled_tasks.json: resolve duplicate periodic task pk (4 -> 15)
- db_utils.py: use function parameter in _get_status_pattern_matching
  instead of capturing the enclosing scope variable
- url_detail.html: fix wrong field name image_urls -> images_url
- settings.py: align Celery queues (default/light/heavy) with the task
  queues and supervisord workers
- Add /task/publish_<id>/ route to fix broken publish links in templates

app_urls/fetcher/urls.py

@@ -17,4 +17,5 @@ urlpatterns = [
     #
     path('urls/', views.filtered_urls, name='filtered_urls'),
     path('urls/<int:id>/', views.url_detail_view, name='url_detail'),
+    path('task/publish_<int:id>/', views.publish, name='publish'),
 ]