feat: role delete logging, used invite logging, also some random changes

Catalogger.Backend/Bot/Responders/MemberUpdate/GuildMemberUpdateResponder.cs

@@ -0,0 +1,38 @@
+using Catalogger.Backend.Cache;
+using Remora.Discord.API.Abstractions.Gateway.Events;
+using Remora.Discord.Gateway.Responders;
+using Remora.Results;
+
+namespace Catalogger.Backend.Bot.Responders.MemberUpdate;
+
+public class GuildMemberUpdateResponder(ILogger logger, IMemberCache memberCache)
+    : IResponder<IGuildMemberUpdate>
+{
+    private readonly ILogger _logger = logger.ForContext<GuildMemberUpdateResponder>();
+
+    public async Task<Result> RespondAsync(
+        IGuildMemberUpdate newMember,
+        CancellationToken ct = default
+    )
+    {
+        try
+        {
+            var oldMember = await memberCache.TryGetAsync(newMember.GuildID, newMember.User.ID);
+            if (oldMember == null)
+            {
+                _logger.Information(
+                    "Received member update event for {MemberId} in {GuildId} but they weren't cached, ignoring",
+                    newMember.User.ID,
+                    newMember.GuildID
+                );
+                return Result.Success;
+            }
+        }
+        finally
+        {
+            await memberCache.UpdateAsync(newMember);
+        }
+
+        return Result.Success;
+    }
+}