feat: series-aware schedule edits + waitlist ledger removal (M32)

PATCH /v1/catalog/class-schedules/:id patches a recurring rule and,
with applyToFuture, retimes materialized future sessions to the new
local start time on their existing dates — moving confirmed and
waitlisted bookings with them and re-arming reminders. Zones-page
schedule rows gain an inline editor (CS/EN).

Also drops the vestigial waitlist_entries table (migration 00020):
positions derive from bookings.created_at, so the ledger was written
but never read.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/backend/internal/bookings/customer_service.go

@@ -518,13 +518,10 @@ func (s *CustomerService) MoveBookingToSession(ctx context.Context, reference st
 	if err != nil {
 		return domain.MoveBookingResponse{}, err
 	}
-	confirmed, waitlisted := 0, 0
+	confirmed := 0
 	for _, other := range targetBookings {
-		switch other.Status {
-		case "confirmed":
+		if other.Status == "confirmed" {
 			confirmed++
-		case "waitlisted":
-			waitlisted++
 		}
 	}
 
@@ -534,30 +531,15 @@ func (s *CustomerService) MoveBookingToSession(ctx context.Context, reference st
 		newStatus = "waitlisted"
 	}
 
-	// Release the old spot first so the seat/queue position is free before
-	// the retarget lands.
-	if booking.Status == "waitlisted" {
-		_ = s.repo.ResolveWaitlistEntry(ctx, booking.TenantID, currentSession.ID, booking.CustomerEmail)
-	}
 	if err := s.repo.UpdateBookingSession(ctx, booking.ID, target.ID, target.StartsAt, target.EndsAt, newStatus); err != nil {
 		return domain.MoveBookingResponse{}, err
 	}
-	if newStatus == "waitlisted" {
-		if err := s.repo.AppendWaitlistEntry(ctx, db.WaitlistEntryParams{
-			TenantID:       booking.TenantID,
-			ClassSessionID: target.ID,
-			CustomerName:   booking.CustomerName,
-			CustomerEmail:  booking.CustomerEmail,
-			Position:       waitlisted + 1,
-		}); err != nil {
-			return domain.MoveBookingResponse{}, err
-		}
-	}
 
 	// Re-arm reminders for the new window (confirmed only; a queue spot
 	// re-arms on promotion through the shared confirm path).
-	if err := s.repo.DeletePendingReminderJobsForBooking(ctx, booking.ID); err == nil && newStatus == "confirmed" {
-		_ = armReminderJobs(ctx, s.repo, booking.TenantID, booking.ID, target.StartsAt, booking.CustomerPhone)
+	if newStatus == "confirmed" {
+		booking.StartsAt, booking.EndsAt = target.StartsAt, target.EndsAt
+		RearmReminderJobs(ctx, s.repo, booking.TenantID, booking)
 	}
 
 	// A confirmed move frees a seat on the old session — drain its queue.