feat: add session capacity waitlist

src/GmRelay.Bot/Features/Confirmation/HandleRsvp/HandleRsvpHandler.cs

@@ -48,9 +48,10 @@ public sealed class HandleRsvpHandler(
                 WHERE sp.session_id = @SessionId
                   AND p.telegram_id = @TelegramUserId
                   AND sp.is_gm = false
+                  AND sp.registration_status = @Active
             )
             """,
-            new { command.SessionId, command.TelegramUserId },
+            new { command.SessionId, command.TelegramUserId, Active = ParticipantRegistrationStatus.Active },
             transaction);
 
         if (!participantExists)
@@ -69,9 +70,10 @@ public sealed class HandleRsvpHandler(
                    responded_at = now()
             WHERE  session_id = @SessionId
               AND  player_id  = (SELECT id FROM players WHERE telegram_id = @TelegramUserId)
+              AND  registration_status = @Active
               AND  rsvp_status != @Status
             """,
-            new { command.SessionId, command.TelegramUserId, command.Status },
+            new { command.SessionId, command.TelegramUserId, command.Status, Active = ParticipantRegistrationStatus.Active },
             transaction);
 
         if (updated == 0)
@@ -156,12 +158,14 @@ public sealed class HandleRsvpHandler(
                     count(*) FILTER (WHERE rsvp_status = @Declined)  AS Declined
                 FROM session_participants
                 WHERE session_id = @SessionId AND is_gm = false
+                  AND registration_status = @Active
                 """,
                 new
                 {
                     command.SessionId,
                     Confirmed = RsvpStatus.Confirmed,
-                    Declined = RsvpStatus.Declined
+                    Declined = RsvpStatus.Declined,
+                    Active = ParticipantRegistrationStatus.Active
                 },
                 transaction);
 
@@ -234,10 +238,12 @@ public sealed class HandleRsvpHandler(
                        sp.rsvp_status AS RsvpStatus
                 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
                 ORDER BY sp.responded_at NULLS LAST
                 """,
-                new { command.SessionId })).ToList();
+                new { command.SessionId, Active = ParticipantRegistrationStatus.Active })).ToList();
 
             var confirmed = participants.Where(p => p.RsvpStatus == RsvpStatus.Confirmed).ToList();
             var declined = participants.Where(p => p.RsvpStatus == RsvpStatus.Declined).ToList();

src/GmRelay.Bot/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs

@@ -60,9 +60,11 @@ public sealed class SendConfirmationHandler(
                    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 { SessionId = sessionId })).ToList();
+            new { SessionId = sessionId, Active = ParticipantRegistrationStatus.Active })).ToList();
 
         if (participants.Count == 0)
         {