feat: add session capacity waitlist

tests/GmRelay.Bot.Tests/Rendering/SessionBatchRendererTests.cs

@@ -14,14 +14,15 @@ public sealed class SessionBatchRendererTests
 
         var sessions = new[]
         {
-            new SessionBatchDto(secondSessionId, new DateTime(2026, 4, 27, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned),
-            new SessionBatchDto(cancelledSessionId, new DateTime(2026, 4, 28, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Cancelled),
-            new SessionBatchDto(firstSessionId, new DateTime(2026, 4, 26, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned)
+            new SessionBatchDto(secondSessionId, new DateTime(2026, 4, 27, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 4),
+            new SessionBatchDto(cancelledSessionId, new DateTime(2026, 4, 28, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Cancelled, null),
+            new SessionBatchDto(firstSessionId, new DateTime(2026, 4, 26, 18, 0, 0, DateTimeKind.Utc), SessionStatus.Planned, 2)
         };
         var participants = new[]
         {
-            new ParticipantBatchDto(secondSessionId, "Alice", "alice"),
-            new ParticipantBatchDto(cancelledSessionId, "Bob", null)
+            new ParticipantBatchDto(secondSessionId, "Alice", "alice", ParticipantRegistrationStatus.Active),
+            new ParticipantBatchDto(secondSessionId, "Charlie", null, ParticipantRegistrationStatus.Waitlisted),
+            new ParticipantBatchDto(cancelledSessionId, "Bob", null, ParticipantRegistrationStatus.Active)
         };
 
         var result = SessionBatchRenderer.Render("Campaign", sessions, participants);
@@ -35,7 +36,11 @@ public sealed class SessionBatchRendererTests
         Assert.Contains("Campaign", text);
         Assert.True(firstIndex < secondIndex);
         Assert.True(secondIndex < thirdIndex);
+        Assert.Contains("Места: 0/2", text);
+        Assert.Contains("Места: 1/4", text);
         Assert.Contains("@alice", text);
+        Assert.Contains("Лист ожидания (1)", text);
+        Assert.Contains("Charlie", text);
         Assert.Contains("Bob", text);
         Assert.Equal(2, result.Markup.InlineKeyboard.Count());
         Assert.Collection(
@@ -45,6 +50,7 @@ public sealed class SessionBatchRendererTests
             callbackData => Assert.Equal($"reschedule_session:{firstSessionId}", callbackData),
             callbackData => Assert.Equal($"join_session:{secondSessionId}", callbackData),
             callbackData => Assert.Equal($"cancel_session:{secondSessionId}", callbackData),
-            callbackData => Assert.Equal($"reschedule_session:{secondSessionId}", callbackData));
+            callbackData => Assert.Equal($"reschedule_session:{secondSessionId}", callbackData),
+            callbackData => Assert.Equal($"promote_waitlist:{secondSessionId}", callbackData));
     }
 }