* chore: BookingHydrationService - generate calendarEvent without PII
* chore: wip add build calendarEvent from booking in CalEventBuilder
* chore: build calendar event from booking
* remove hydration service
* test: add comprehensive test for CalendarEventBuilder.fromBooking with all properties
- Add vi.mock() calls for external dependencies (getBookerBaseUrl, getTranslation, getCalEventResponses)
- Add comprehensive test 'should create a complete calendar event with all properties using a booking'
- Test covers team scheduling, video calls, seats/webinar, recurring events, custom fields, and all configuration flags
- Fix import paths in CalendarEventBuilder.ts to use @calcom/features prefix
- Fix timestamp format issues in existing tests to use toISOString()
- Fix destinationCalendar length expectations to account for user calendar
- Fix responses format in seats tests to match bookingResponsesSchema
Co-Authored-By: morgan@cal.com <morgan@cal.com>
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Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
