add unavailable media state for plex media (#754)

* rework plex movie library scanner; add unavailable media item state

* plex television scanner improvements

* reset plex etags as needed

* update changelog

ErsatzTV.Core/Interfaces/Plex/IPlexMovieLibraryScanner.cs

@@ -11,5 +11,6 @@ public interface IPlexMovieLibraryScanner
         PlexLibrary library,
         string ffmpegPath,
         string ffprobePath,
-        bool deepScan);
+        bool deepScan,
+        CancellationToken cancellationToken);
 }

ErsatzTV.Core/Interfaces/Plex/IPlexPathReplacementService.cs

@@ -4,6 +4,6 @@ namespace ErsatzTV.Core.Interfaces.Plex;
 
 public interface IPlexPathReplacementService
 {
-    Task<string> GetReplacementPlexPath(int libraryPathId, string path);
+    Task<string> GetReplacementPlexPath(int libraryPathId, string path, bool log = true);
     string GetReplacementPlexPath(List<PlexPathReplacement> pathReplacements, string path, bool log = true);
 }

ErsatzTV.Core/Interfaces/Plex/IPlexTelevisionLibraryScanner.cs

@@ -11,5 +11,6 @@ public interface IPlexTelevisionLibraryScanner
         PlexLibrary library,
         string ffmpegPath,
         string ffprobePath,
-        bool deepScan);
+        bool deepScan,
+        CancellationToken cancellationToken);
 }