fix: Improve member fetching in userinfo command with error handling for better user experience

cogs/user_info_cog.py

@@ -13,6 +13,17 @@ class UserInfoCog(commands.Cog):
         if member is None:
             member = ctx.author
 
+        # Fetch the member to ensure up-to-date data, especially for guild members
+        if ctx.guild:
+            try:
+                member = await ctx.guild.fetch_member(member.id)
+            except discord.NotFound:
+                await ctx.send("Could not find the specified member in this server.", ephemeral=True)
+                return
+            except discord.HTTPException as e:
+                await ctx.send(f"An error occurred while fetching member data: `{e}`", ephemeral=True)
+                return
+
         # --- Information Gathering ---
         username_discriminator = f"{member.name}#{member.discriminator}" if member.discriminator != "0" else member.name
         created_at_str = member.created_at.strftime("%Y-%m-%d %H:%M:%S UTC")