Folder Watching Polish + Epub Fix (#1550)

* Fixed entrypoint writing bad json (from develop)

* Fixed a bug where log file could write out a crap ton of information (serializing Series object) when a db error occurs.

* Fixed an issue with scan loop where concurrency issues could occur on new series being added.

* Tweaked the logger to suppress some noisy logs when using Debug log level.

* Fixed a regression with epub parsing from v3.2 of Vers-One's release

* Fixed up folder watching to work more reliable. Validated in production.

* Code cleanup

API/Startup.cs

@@ -268,7 +268,10 @@ public class Startup
         });
 
         app.UseSerilogRequestLogging(opts
-            => opts.EnrichDiagnosticContext = LogEnricher.EnrichFromRequest);
+            =>
+        {
+            opts.EnrichDiagnosticContext = LogEnricher.EnrichFromRequest;
+        });
 
         app.Use(async (context, next) =>
         {