scan with below-normal priority when unforced (#1123)

CHANGELOG.md

@@ -13,7 +13,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Always use software pipeline for error display
   - This ensures errors will display even when hardware acceleration is misconfigured
 - Call scanner process only when scanning is required based on library refresh interval
-- Use idle priority for scanner process with unforced (automatic) library scans
+- Use lower process priority for scanner process with unforced (automatic) library scans
 
 ## [0.7.2-beta] - 2023-01-05
 ### Fixed

ErsatzTV.Scanner/Worker.cs

@@ -181,7 +181,7 @@ public class Worker : BackgroundService
         try
         {
             using var process = Process.GetCurrentProcess();
-            process.PriorityClass = ProcessPriorityClass.Idle;
+            process.PriorityClass = ProcessPriorityClass.BelowNormal;
         }
         catch (Exception ex)
         {