Cal.com v5.3.9 — Release Notes & Engineering Impact

## What's Changed * fix: generator enums in prisma db by @nerdberg792 in https://github.com/calcom/cal.com/pull/21595 * feat: v2 return team event type hosts username by @supalarry in https://github.com/calcom/cal.com/pull/21617 * perf: upgrade to next 15.3.2 by @hbjORbj in https://github.com/calcom/cal.com/pull/21610 * fix: recording button bug by @Udit-takkar in https://github.com/calcom/cal.com/pull/21609 * feat: add support for custom no schedule children in AvailabilitySett… by @Devanshusharma2005 in https://github.com/calcom/cal.com/pull/21601 * feat: OnformChange on Availability Settings Atom by @weknowyourgame in https://github.com/calcom/cal.com/pull/21560 * feat: update translations via @LingoDotDev by @calcom-bot in https://github.com/calcom/cal.com/pull/21260 * refactor: Use a deployment repository to interact with license keys by @emrysal in https://github.com/calcom/cal.com/pull/21613 * fix: v2 slots reservation by @supalarry in https://github.com/calcom/cal.com/pull/21623 * perf: migrate listHandler to AttributeRepository + cache attributes fetching in RSCs by @devin-ai-integration in https://github.com/calcom/cal.com/pull/21552 * revert: "perf: use app dir to fetch team feature flags in settings" by @Udit-takkar in https://github.com/calcom/cal.com/pull/21628 * feat: Enable Adding Custom children components at the bottom of EventMeta within Booker using children component props by @weknowyourgame in https://github.com/calcom/cal.com/pull/21618 * fix: revalidations for attributes are missing in some places by @hbjORbj in https://github.com/calcom/cal.com/pull/21632 * feat: Support NEXT_PUBLIC_SINGLE_ORG_SLUG to force that slug similar to x-cal-force-slug(which works in E2E only) by @hariombalhara in https://github.com/calcom/cal.com/pull/21622 * fix: Form preview erroring if not all team members are hosts by @joeauyeung in https://github.com/calcom/cal.com/pull/21598 * fix: platformPlanGuard per active users plan by @ThyMinimalDev in https://github.com/calcom/cal.com/pull/21642 * refactor: v2 dont allow rescheduling cancelled,rescheduled bookings by @supalarry in https://github.com/calcom/cal.com/pull/21643 * feat: Add loadingStateChildren prop to AvailabilitySettingsPlatformWr… by @akarsh-jain-790 in https://github.com/calcom/cal.com/pull/21602 * feat: move filter segment selection from localStorage to database by @devin-ai-integration in https://github.com/calcom/cal.com/pull/21523 * refactor: v2 reschedule booking error messages by @supalarry in https://github.com/calcom/cal.com/pull/21647 * fix: Correct typo 'siège' to 'place' in French translation by @Zenrac in https://github.com/calcom/cal.com/pull/21671 * chore: only use event api v2 call if route is in env by @sean-brydon in https://github.com/calcom/cal.com/pull/21680 * fix: Remove hard dependency on NEXT_PUBLIC_API_V2_URL by @emrysal in https://github.com/calcom/cal.com/pull/21682 * fix: Update handlers and refactor code by @anikdhabal in https://github.com/calcom/cal.com/pull/21686 * fix: self hosted feature check by @zomars in https://github.com/calcom/cal.com/pull/21690 * fix-wrong-url-on-auth-error by @hariombalhara in https://github.com/calcom/cal.com/pull/21693 * fix: no show not updating in sync by @parteekmalik in https://github.com/calcom/cal.com/pull/21687 * fix: [object object] for name when rescheduling a past booking by @hariombalhara in https://github.com/calcom/cal.com/pull/21695 * fix: Fixed pl translation typo by @devklepacki in https://github.com/calcom/cal.com/pull/21723 * feat: add setting to allow booking through a reschedule link by @devin-ai-integration in https://github.com/calcom/cal.com/pull/21652 * fix: update delegation credentials api-v2 by @ThyMinimalDev in https://github.com/calcom/cal.com/pull/21739 * chore: Downgrade Next to 15.3.0 by @joeauyeung in https://github.com/calcom/cal.com/pull/21746 ## New Contributors * @nerdberg792 made their first contribution in https://github.com/calcom/cal.com/pull/21595 * @weknowyourgame made their first contribution in https://github.com/calcom/cal.com/pull/21560 * @Zenrac made their first contribution in https://github.com/calcom/cal.com/pull/21671 * @devklepacki made their first contribution in https://github.com/calcom/cal.com/pull/21723 **Full Changelog**: https://github.com/calcom/cal.com/compare/v5.3.8...v5.3.9