Before this commit when the user wants to see the burndown chart of a
old large project then the report could take more than 20 sec to be
loaded.
This commit adds 2 indexes one on `mail_tracking_value` table
(`mail.tracking.value` model) and the other one on `mail_message` table
(`mail.message` model) to reduce the load of that report to less than
10 sec.
task-3177072
closesodoo/odoo#114114
X-original-commit: c6b355d471889634ae26a020e14c81e9a315b3de
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>
Co-authored-by: Yannick Tivisse <yti@odoo.com>
