Purpose
=======
When someone receives an email with a rating request, he can click on a
smiley. But if he does not write a feedback, nobody is notified. This means
some rating as somehow lost and people are not notified of it.
Specifications
==============
Now, when the user clicks on the smiley, a message is posted but notifications
are not yet sent. This uses the new ``mail.message.schedule`` mechanism added
in this PR. It gives the user some time to write their feedback and send it.
If they write and submit a feedback, the notification process is launched.
Emails and inbox notifications are created and sent.
If they don't write a feedback notification process is launch after 2 hours.
Testing
=======
Some cleaning is done in tests, notably to split some fields tests from
performance test. A bit performance test is also split into sub tests in
order to better understand queries.
Task-2207626 (Rating: Log ratings, post feedbacks)
Part-of: odoo/odoo#95623
Co-authored-by: Thibault Delavallée <tde@odoo.com>
