Implement count estimate query for postgresdb (#7956)

Content.Server.Database/ModelSqlite.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using System.Net;
 using System.Text;
 using System.Text.Json;
@@ -81,6 +82,11 @@ namespace Content.Server.Database
                 .HasConversion(jsonByteArrayConverter);
         }
 
+        public override int CountAdminLogs()
+        {
+            return AdminLog.Count();
+        }
+
         private static string InetToString(IPAddress address, int mask) {
             if (address.IsIPv4MappedToIPv6)
             {