[Feature Request] Add support for upcoming & recurring maintenance (mileage based) linked to #125

[r0verchr0me]

Hello @javedh-dev ,

Thanks again for the great work — really impressive.

I’m reopening this issue because the current implementation only partially addresses the requirement, as it is based solely on date-based reminders.

What is still missing (and is actually more critical in our use case):

1. Mileage-based reminders
   Reminders should be triggered based on vehicle mileage, not only on dates.
2. Option to log only the current mileage
   There should be a way to record just the current odometer value, allowing the system to correctly calculate:
   • distance since last service
   • upcoming maintenance thresholds

Without this, it’s difficult to rely on the reminders for real operational tracking.

Thanks again for your work, and happy to clarify or test if needed.