feat: add hashedLink to BOOKING_REQUESTED webhook payload (calcom#25274)

- Add hashedLink field to CalendarEvent type definition
- Add withHashedLink method to CalendarEventBuilder
- Pass hashedLink from booking request to CalendarEvent in RegularBookingService
- hashedLink will now be included in webhook payloads when booking via private API links

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

Author: ThyMinimalDev

packages/features/CalendarEventBuilder.ts

@@ -479,6 +479,14 @@ export class CalendarEventBuilder {
     return this;
   }
 
+  withHashedLink(hashedLink?: string | null) {
+    this.event = {
+      ...this.event,
+      hashedLink,
+    };
+    return this;
+  }
+
   build(): CalendarEvent | null {
     // Validate required fields
     if (

packages/features/bookings/lib/service/RegularBookingService.ts

@@ -1387,6 +1387,7 @@ async function handler(
       platformCancelUrl,
       platformBookingUrl,
     })
+    .withHashedLink(hasHashedBookingLink ? reqBody.hashedLink ?? null : null)
     .build();
 
   if (!builtEvt) {

packages/types/Calendar.d.ts

@@ -163,6 +163,7 @@ export interface CalendarEvent {
   // Instead of sending this per event.
   // TODO: Links sent in email should be validated and automatically redirected to org domain or regular app. It would be a much cleaner way. Maybe use existing /api/link endpoint
   bookerUrl?: string;
+  hashedLink?: string | null;
   type: string;
   title: string;
   startTime: string;