Improvement

🚥 LED heartbeats always active

Some more performance improvements have resulted in being able to turn on LED heartbeats for all users and all devices. This means more reliable LED states in groups with multiple apps/devices/plugins.

Fix

• Fixed "Run" and "Assign" indicators not working for any groups assigned to multiple apps/devices/plugins
• Fixed "Assign" indicator priority logic to prioritise plugins over apps and devices
• Fixed Core crash due to a very rare race condition during foreground session checking against existing sessions