Resolve "Notification of the wrong user when answering a question"

Description

#62 (closed) Resolving the notifictions bug when adding an answer to a question

Migration and compatibility

• The merge request updates the models, as a consequences, database migrations are needed.
• The merge request breaks the compatibility.

TODO

Before being accepted, any merge request must fulfill the following requirements:

• Check PEP8 writing style as described in CONTRIBUTING.md.
• Ensure existing tests are still working properly.
• Features have been tested.
• Every translatable strings are written in proper english.
• Every translatable strings are tagged for translation using gettext, blocktrans and/or trans.
• Ensure that there is no side effect in files: changes are only related to one, and only one feature.
• Ensure that no file has been removed by accident.
• API is documented, as well as the behavior, if needed, in docs.
• Ensure the commit history is “clean enough” (this means no extra merge commits, etc).
• Ensure pipeline succeeds.

Steps to Test or Reproduce

git pull --prune
git checkout 62-notification-of-the-wrong-user-when-answering-a-question

Create a question and answer to it. Now, you must receive a notification that notifies the user that a reply has been received.

Impacted Areas in Application

Notification system of the Agora

Closes #62 (closed)