Logging Enhancements (#1521)

* Recreated Kavita Logging with Serilog instead of Default. This needs to be move out of the appsettings now, to allow auto updater to patch.

* Refactored the code to be completely configured via Code rather than appsettings.json. This is a required step for Auto Updating.

* Added in the ability to send logs directly to the UI only for users on the log route. Stopping implementation as Alerts page will handle the rest of the implementation.

* Fixed up the backup service to not rely on Config from appsettings.json

* Tweaked the Logging levels available

* Moved everything over to File-scoped namespaces

* Moved everything over to File-scoped namespaces

* Code cleanup, removed an old migration and changed so debug logging doesn't print sensitive db data

* Removed dead code

API/SignalR/LogHub.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Threading.Tasks;
+using API.Extensions;
+using API.SignalR.Presence;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.SignalR;
+
+namespace API.SignalR;
+
+public interface ILogHub : Serilog.Sinks.AspNetCore.SignalR.Interfaces.IHub
+{
+}
+
+[Authorize]
+public class LogHub : Hub<ILogHub>
+{
+    private readonly IEventHub _eventHub;
+    private readonly IPresenceTracker _tracker;
+
+    public LogHub(IEventHub eventHub, IPresenceTracker tracker)
+    {
+        _eventHub = eventHub;
+        _tracker = tracker;
+    }
+
+
+    public override async Task OnConnectedAsync()
+    {
+        await _tracker.UserConnected(Context.User.GetUsername(), Context.ConnectionId);
+        await base.OnConnectedAsync();
+    }
+
+    public override async Task OnDisconnectedAsync(Exception exception)
+    {
+        await _tracker.UserDisconnected(Context.User.GetUsername(), Context.ConnectionId);
+        await base.OnDisconnectedAsync(exception);
+    }
+
+    public async Task SendLogAsString(string message)
+    {
+        await _eventHub.SendMessageAsync("LogString", new SignalRMessage()
+        {
+            Body = message,
+            EventType = "LogString",
+            Name = "LogString",
+        }, true);
+    }
+
+    public async Task SendLogAsObject(object messageObject)
+    {
+        await _eventHub.SendMessageAsync("LogObject", new SignalRMessage()
+        {
+            Body = messageObject,
+            EventType = "LogString",
+            Name = "LogString",
+        }, true);
+    }
+}