The Time model is deleted and replaced with the new Clock model. The differences are that there can be several clocks, whereas Time was a singleton, and that a clock must define the frequency at which it updates. The new model ClockWatcher is added to model a record that makes use of a clock. This is currently useful for the clocks to set or clear intervals as needed. closes odoo/odoo#86219 Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>