Kodi only checks for add-on updates every 24 hours

Describe the feature

In a VOD-centric world, Kodi add-ons are living by the grace of the VOD content provider and the stability of the VOD infrastructure. Unfortunately, since Kodi add-ons are not first-class citizens, they are not prepared or made aware of coming changes to the VOD infrastructure.

This means that "suddenly" the Kodi add-on stops working when the VOD infrastructure undergoes changes that the Kodi add-on was not prepared for. This immediately impacts users. And no matter how fast add-on developers react, or how well they are improving their processes, this will always be reactive.

Many add-ons pro-actively test their add-ons at full length and are made aware of such issues as soon as they arise, and a fix is out as fast as possible. We still need to wait until the add-on is being accepted and merged in the Kodi repository, And additionally it takes up to 24 hours to get these add-ons installed on end-user systems.

24 hours mean that daily users are always affected, which is a real problem for Kodi as a reliable platform.

• Mean time to detection (MTTD) is now close to 0
• Mean time to acknowledge (MTTA) depends on add-on development team, could be within hours
• Mean time to recovery (MTTR) is a problem
  • Fixing depends on add-on development team
  • Getting it merged into Kodi repository depends on Team Kodi
  • Getting it on user systems depends on this 24h check in Kodi

We would like to see this 24 hour check in Kodi to be reduced to 4 or 6 hours so that fixes can be delivered before they impact end-users.

In most cases being able to get the fix on end-users systems by 18:00 would avoid impacting the majority of users.

Start by reviewing Kodi's add-on update-check behavior and the merged pull requests #767 and #769, since the issue does not name project files or tests. The change should reduce the current 24-hour check interval to roughly 4 or 6 hours and confirm that approved add-on fixes reach end users sooner.