refactor: move getTotalBookingDuration to BookingRepository (#22931)

* refactor: move getTotalBookingDuration to BookingRepository

- Move getTotalBookingDuration function from standalone file to BookingRepository class
- Update all usage sites to call method through repository instance
- Remove standalone function file packages/lib/server/queries/booking/index.ts
- Add prisma import to util.ts for BookingRepository instantiation
- Maintain exact same method signature and functionality

Co-Authored-By: morgan@cal.com <morgan@cal.com>

* fix: remove eslint-config-next to resolve TypeScript ESLint conflicts

- Remove eslint-config-next dependency that was causing version conflicts
- Resolves 'Class extends value undefined is not a constructor or null' errors
- ESLint 'next' config issue appears to be pre-existing in main branch

Co-Authored-By: morgan@cal.com <morgan@cal.com>

* fixup! Merge branch 'main' into devin/move-getTotalBookingDuration-1754460208

* chore: bump platform libs

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: morgan@cal.com <morgan@cal.com>
Co-authored-by: Morgan <33722304+ThyMinimalDev@users.noreply.github.com>

apps/api/v2/package.json

@@ -38,7 +38,7 @@
     "@axiomhq/winston": "^1.2.0",
     "@calcom/platform-constants": "*",
     "@calcom/platform-enums": "*",
-    "@calcom/platform-libraries": "npm:@calcom/platform-libraries@0.0.287",
+    "@calcom/platform-libraries": "npm:@calcom/platform-libraries@0.0.288",
     "@calcom/platform-types": "*",
     "@calcom/platform-utils": "*",
     "@calcom/prisma": "*",