__getitem__() of BaseModel, reset the prefetch set of the recordset. Fix _compute_activity_date_deadline, to batched the reading of activity's deadline. closes odoo/odoo#154860 X-original-commit: ef7226aaa2f0ad135133fe27bdf1414b7ebf2a92 Signed-off-by: Rémy Voet (ryv) <ryv@odoo.com>