fix: Set user's timezone as fallback to event's timezone (#16065)

* fix: Set user's timezone as fallback to event's timezone

Signed-off-by: Souptik Datta <souptikdatta2001@gmail.com>

* fix: Use find method instead of filter

Signed-off-by: Souptik Datta <souptikdatta2001@gmail.com>

* chore: Remove user default schedule ID check

Signed-off-by: Souptik Datta <souptikdatta2001@gmail.com>

* revert error message

* fix

---------

Signed-off-by: Souptik Datta <souptikdatta2001@gmail.com>
Co-authored-by: Anik Dhabal Babu <81948346+anikdhabal@users.noreply.github.com>
Co-authored-by: Peer Richelsen <peeroke@gmail.com>

packages/features/bookings/lib/handleNewBooking.ts

@@ -294,7 +294,11 @@ async function handler(
     })
   );
 
-  const eventTimeZone = eventType.schedule?.timeZone ?? null;
+  const user = eventType.users.find((user) => user.id === eventType.userId);
+
+  const userSchedule = user?.schedules.find((schedule) => schedule.id === user?.defaultScheduleId);
+
+  const eventTimeZone = eventType.schedule?.timeZone ?? userSchedule?.timeZone;
 
   let timeOutOfBounds = false;
   try {