feat: add session capacity waitlist

src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs

@@ -89,9 +89,11 @@ public sealed class HandleRescheduleTimeInputHandler(
             SELECT p.id AS PlayerId, p.display_name AS DisplayName, p.telegram_username AS TelegramUsername
             FROM session_participants sp
             JOIN players p ON p.id = sp.player_id
-            WHERE sp.session_id = @SessionId AND sp.is_gm = false
+            WHERE sp.session_id = @SessionId
+              AND sp.is_gm = false
+              AND sp.registration_status = @Active
             """,
-            new { proposal.SessionId })).ToList();
+            new { proposal.SessionId, Active = ParticipantRegistrationStatus.Active })).ToList();
 
         // 4. If no participants — reschedule immediately
         if (participants.Count == 0)
@@ -214,17 +216,20 @@ public sealed class HandleRescheduleTimeInputHandler(
             await using var conn = await dataSource.OpenConnectionAsync(ct);
 
             var batchSessions = (await conn.QueryAsync<SessionBatchDto>(
-                "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
+                "SELECT id AS SessionId, scheduled_at AS ScheduledAt, status AS Status, max_players AS MaxPlayers FROM sessions WHERE batch_id = @BatchId ORDER BY scheduled_at",
                 new { proposal.BatchId })).ToList();
 
             var batchParticipants = (await conn.QueryAsync<ParticipantBatchDto>(
                 """
-                SELECT sp.session_id AS SessionId, p.display_name AS DisplayName, p.telegram_username AS TelegramUsername
+                SELECT sp.session_id AS SessionId,
+                       p.display_name AS DisplayName,
+                       p.telegram_username AS TelegramUsername,
+                       sp.registration_status AS RegistrationStatus
                 FROM session_participants sp
                 JOIN players p ON sp.player_id = p.id
                 JOIN sessions s ON sp.session_id = s.id
                 WHERE s.batch_id = @BatchId AND sp.is_gm = false
-                ORDER BY sp.responded_at ASC, p.created_at ASC
+                ORDER BY sp.registration_status ASC, sp.created_at ASC, sp.responded_at ASC, p.created_at ASC
                 """,
                 new { proposal.BatchId })).ToList();