duration_percent field is a stored integer.
In postgresql, integer are 4 Bytes long, which create a range of -2147483648 to +2147483647.
With a small duration_expected, and a big duration, we can easily break these limits.

OPW-3253333

closes odoo/odoo#117737

X-original-commit: 97892d04
Signed-off-by: William Henrotin (whe) <whe@odoo.com>
Signed-off-by: David <dafr@odoo.com>