Create an activity to vehicle fleet manager days before service date

This module helps fleet managers stay on top of vehicle maintenance by creating a to-do activity when a service is approaching.

• In Fleet settings you can set how many days before the service date the activity should be created (default 30 days).
• A daily scheduled job checks vehicle service records that are still open (state new or running), whose service date is within that window, and whose vehicle has a manager assigned.
• For each such service, an activity of type "Service to Check" is assigned to the vehicle's manager, dated on the service date.
• The activity is only created once per service record, so managers are not flooded with duplicates.

It works on the fleet service log (fleet.vehicle.log.services) and uses the vehicle's manager field to decide who receives the activity. The activity type appears in the standard Odoo activity menu with a car icon. No new menus are added; the only new setting appears inside the existing Fleet configuration screen.