Adds missing index on `project.task` `state`, this field is used in a lot of searches as a search criteria like "open tasks". task-3416393 closes odoo/odoo#127841 X-original-commit: 147446d86d7d33a83f83a8699c930fcdd3dbb99b Signed-off-by: Olivier Dony (odo) <odo@odoo.com> Signed-off-by: Piryns Victor (pivi) <pivi@odoo.com>