v6.1.3

## What's Changed
* perf: `getUserAvailability` if `dateRange` is empty, early return by @joeauyeung in https://github.com/calcom/cal.com/pull/26000
* fix: handle invalid timezones gracefully in calendar events by @hbjORbj in https://github.com/calcom/cal.com/pull/27042
* feat: remove Revert.dev dependency from Pipedrive integration by @anikdhabal in https://github.com/calcom/cal.com/pull/22492
* feat: add option to hide duration selector in booking page for multiple durations by @devin-ai-integration[bot] in https://github.com/calcom/cal.com/pull/27033
* refactor: Handle unavailable features on iOS and consolidate Settings UI by @dhairyashiil in https://github.com/calcom/cal.com/pull/27081
* fix: filter out Google system calendars from calendar list by @volnei in https://github.com/calcom/cal.com/pull/27074
* chore: ensure default calendars with trigger.dev apiv2 by @ThyMinimalDev in https://github.com/calcom/cal.com/pull/27058
* refactor: remove Object.freeze hack in getConnectedCalendars by @emrysal in https://github.com/calcom/cal.com/pull/27070
* refactor: remove usage of deprecated user.startTime and user.endTime columns by @emrysal in https://github.com/calcom/cal.com/pull/27085
* refactor: store timestamp instead of boolean for feature opt-in by @eunjae-lee in https://github.com/calcom/cal.com/pull/27080
* feat: add OAuth client developer settings page with approval workflow by @PeerRich in https://github.com/calcom/cal.com/pull/25556
* feat: add Cloudflare URL Scanner for malicious URL detection by @PeerRich in https://github.com/calcom/cal.com/pull/26387
* fix: use orgAwareUsername in troubleshooter getSchedule request by @hariombalhara in https://github.com/calcom/cal.com/pull/27086
* fix: handle incomplete href attributes in workflow email links by @anikdhabal in https://github.com/calcom/cal.com/pull/27094
* feat: add Help Desk search link when KBar has no results by @PeerRich in https://github.com/calcom/cal.com/pull/27062
* fix: prevent HTML encoding in names by @Anshumancanrock in https://github.com/calcom/cal.com/pull/26959
* fix: make linting required for CI by @volnei in https://github.com/calcom/cal.com/pull/27091
* fix: Made changes to the nav dropdown style to maintain the centre lining … by @Recxsmacx in https://github.com/calcom/cal.com/pull/27038
* refactor: remove redundant filtering in service by @meharobaidullah in https://github.com/calcom/cal.com/pull/25874
* fix: scroll issues in Embed by @Ryukemeister in https://github.com/calcom/cal.com/pull/26583
* fix: nav tab stick position by @volnei in https://github.com/calcom/cal.com/pull/27097
* fix: disable booking actions for cancelled/rejected/past bookings by @eeshm in https://github.com/calcom/cal.com/pull/26926
* fix: clic app icon is not showing by @anikdhabal in https://github.com/calcom/cal.com/pull/27101
* fix: The delete icon for workflow actions is set to the minimal color instead of the destructive color. by @Anshumancanrock in https://github.com/calcom/cal.com/pull/27106
* docs: OAuth self serve by @supalarry in https://github.com/calcom/cal.com/pull/27090
* feat: add assigned badge to team event types by @devin-ai-integration[bot] in https://github.com/calcom/cal.com/pull/27036
* perf: add composite index on EventType(parentId, teamId) by @keithwillcode in https://github.com/calcom/cal.com/pull/27099
* fix: Matched styling of Webhooks just like api keys page. by @Recxsmacx in https://github.com/calcom/cal.com/pull/27116
* fix: prevent CalDAV duplicate invitations with RFC-compliant SCHEDULE-AGENT by @yuvrajangadsingh in https://github.com/calcom/cal.com/pull/22434
* fix(umami): add default SCRIPT_URL in zod.ts by @lachlanharrisdev in https://github.com/calcom/cal.com/pull/27114
* test: add e2e test for Feature Opt-In banner by @eunjae-lee in https://github.com/calcom/cal.com/pull/27100
* feat: store utm tags in stripe on signup by @Amit91848 in https://github.com/calcom/cal.com/pull/26838
* feat: add monthly proration processing by @sean-brydon in https://github.com/calcom/cal.com/pull/27002
* refactor: companion event type query parameters by @dhairyashiil in https://github.com/calcom/cal.com/pull/27125

## New Contributors
* @meharobaidullah made their first contribution in https://github.com/calcom/cal.com/pull/25874
* @yuvrajangadsingh made their first contribution in https://github.com/calcom/cal.com/pull/22434
* @lachlanharrisdev made their first contribution in https://github.com/calcom/cal.com/pull/27114

**Full Changelog**: https://github.com/calcom/cal.com/compare/v6.1.2...v6.1.3