Enhanced cache clearing to include all Spotify playlist Redis keys

- Added clearing of spotify:matched:* and spotify:matched:ordered:* keys
- This ensures bitrate metadata fix takes effect after cache clear
- Returns count of cleared Redis keys in response

allstarr/Controllers/AdminController.cs

@@ -838,6 +838,7 @@ public class AdminController : ControllerBase
         _logger.LogInformation("Cache clear requested from admin UI");
         
         var clearedFiles = 0;
+        var clearedRedisKeys = 0;
         
         // Clear file cache
         if (Directory.Exists(CacheDirectory))
@@ -856,14 +857,35 @@ public class AdminController : ControllerBase
             }
         }
         
-        // Clear Redis cache for spotify playlists
+        // Clear ALL Redis cache keys for Spotify playlists
+        // This includes matched tracks, ordered tracks, missing tracks, etc.
         foreach (var playlist in _spotifyImportSettings.Playlists)
         {
-            await _cache.DeleteAsync($"spotify:playlist:{playlist.Name}");
-            await _cache.DeleteAsync($"spotify:missing:{playlist.Name}");
+            var keysToDelete = new[]
+            {
+                $"spotify:playlist:{playlist.Name}",
+                $"spotify:missing:{playlist.Name}",
+                $"spotify:matched:{playlist.Name}",
+                $"spotify:matched:ordered:{playlist.Name}"
+            };
+            
+            foreach (var key in keysToDelete)
+            {
+                if (await _cache.DeleteAsync(key))
+                {
+                    clearedRedisKeys++;
+                    _logger.LogInformation("Cleared Redis cache key: {Key}", key);
+                }
+            }
         }
         
-        return Ok(new { message = "Cache cleared", filesDeleted = clearedFiles });
+        _logger.LogInformation("Cache cleared: {Files} files, {RedisKeys} Redis keys", clearedFiles, clearedRedisKeys);
+        
+        return Ok(new { 
+            message = "Cache cleared successfully", 
+            filesDeleted = clearedFiles,
+            redisKeysDeleted = clearedRedisKeys
+        });
     }
     
     /// <summary>