fixed: changed Journaling for osx to prevent db corruption

src/NzbDrone.Core/Datastore/ConnectionStringFactory.cs

@@ -29,7 +29,7 @@ namespace NzbDrone.Core.Datastore
             connectionBuilder.DataSource = dbPath;
             connectionBuilder.CacheSize = (int)-10.Megabytes();
             connectionBuilder.DateTimeKind = DateTimeKind.Utc;
-            connectionBuilder.JournalMode = SQLiteJournalModeEnum.Wal;
+            connectionBuilder.JournalMode = OsInfo.IsOsx ? SQLiteJournalModeEnum.Truncate : SQLiteJournalModeEnum.Wal;
             connectionBuilder.Pooling = true;
 
             return connectionBuilder.ConnectionString;