Misc bunch of changes (#2815)

API/DTOs/Statistics/KavitaPlusMetadataBreakdownDto.cs

@@ -0,0 +1,17 @@
+namespace API.DTOs.Statistics;
+
+public class KavitaPlusMetadataBreakdownDto
+{
+    /// <summary>
+    /// Total amount of Series
+    /// </summary>
+    public int TotalSeries { get; set; }
+    /// <summary>
+    /// Series on the Blacklist (errored or bad match)
+    /// </summary>
+    public int ErroredSeries { get; set; }
+    /// <summary>
+    /// Completed so far
+    /// </summary>
+    public int SeriesCompleted { get; set; }
+}