feat: implement public booking cancellation feature

- Added cancelPublicBooking handler to manage booking cancellations.
- Updated public booking service to include cancellation logic.
- Created cancelPublicBooking schema for input validation.
- Modified public booking confirmation page to allow users to cancel their bookings.
- Enhanced email service to send cancellation confirmation emails.
- Made customerEmail field required in booking schemas and updated related components.
- Updated API client to support cancellation requests.
- Added migration to enforce non-nullable customer_email fields in the database.

apps/frontend/src/features/booking/components/booking-create-dialog.tsx

@@ -42,7 +42,7 @@ const bookingFormSchema = z.object({
     .trim()
     .min(6, 'Ingresa un telefono válido.')
     .max(30, 'El telefono no puede superar los 30 caracteres.'),
-  customerEmail: z.string().email('Ingresá un email válido.').optional().or(z.literal('')),
+  customerEmail: z.string().email('Ingresá un email válido.'),
 });
 
 type BookingForm = z.infer<typeof bookingFormSchema>;
@@ -156,7 +156,7 @@ export function BookingCreateDialog() {
       startTime,
       customerName: values.customerName,
       customerPhone: values.customerPhone,
-      customerEmail: values.customerEmail || undefined,
+      customerEmail: values.customerEmail,
     });
   };