Small fix for a reminder query

src/NadekoBot/Modules/Utility/Remind/RemindService.cs

@@ -1,12 +1,13 @@
 #nullable disable
 using LinqToDB;
 using LinqToDB.EntityFrameworkCore;
+using NadekoBot.Common.ModuleBehaviors;
 using NadekoBot.Services.Database.Models;
 using System.Text.RegularExpressions;
 
 namespace NadekoBot.Modules.Utility.Services;
 
-public class RemindService : INService
+public class RemindService : INService, IReadyExecutor
 {
     private readonly Regex _regex =
         new(
@@ -28,20 +29,25 @@ public class RemindService : INService
         _db = db;
         _creds = creds;
         _eb = eb;
-        _ = StartReminderLoop();
     }
 
-    private async Task StartReminderLoop()
+    public async Task OnReadyAsync()
     {
-        while (true)
+        using var timer = new PeriodicTimer(TimeSpan.FromSeconds(15));
+        while (await timer.WaitForNextTickAsync())
+        {
+            await OnReminderLoopTickInternalAsync();
+        }
+    }
+
+    private async Task OnReminderLoopTickInternalAsync()
     {
-            await Task.Delay(15000);
         try
         {
             var now = DateTime.UtcNow;
             var reminders = await GetRemindersBeforeAsync(now);
             if (reminders.Count == 0)
-                    continue;
+                return;
 
             Log.Information("Executing {ReminderCount} reminders", reminders.Count);
 
@@ -59,7 +65,6 @@ public class RemindService : INService
             Log.Warning(ex, "Error in reminder loop: {ErrorMessage}", ex.Message);
         }
     }
-    }
 
     private async Task RemoveReminders(IEnumerable<int> reminders)
     {
@@ -71,10 +76,10 @@ public class RemindService : INService
         await uow.SaveChangesAsync();
     }
 
-    private Task<List<Reminder>> GetRemindersBeforeAsync(DateTime now)
+    private async Task<List<Reminder>> GetRemindersBeforeAsync(DateTime now)
     {
-        using var uow = _db.GetDbContext();
+        await using var uow = _db.GetDbContext();
-        return uow.Reminders
+        return await uow.Reminders
                   .ToLinqToDBTable()
                   .Where(x => x.ServerId / 4194304 % (ulong)_creds.TotalShards == (ulong)_client.ShardId
                               && x.When < now)