feat:[Booking Audit Stack - 4] Implement audit log reschedule handling

[hariombalhara]

• Update audit action services (Attendee, Cancellation, Reassignment, Rejection)
• Refactor booking-audit architecture documentation
• Integrate audit logging in handleCancelBooking
• Add audit logging to round-robin reassignment flows
• Clean up deprecated schemas
• Fix unused variable linting issues## What does this PR do?

• Fixes #XXXX (GitHub issue number)
• Fixes CAL-XXXX (Linear issue number - should be visible at the bottom of the GitHub issue description)

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---

Summary by cubic

Adds reschedule chain tracking and integrates reschedule audit logging so users can see a complete booking history across reschedules, while hiding logs after a booking is superseded. Also skips authentication and email verification for valid reschedule requests.

• New Features

  • Added originalBookingUid to Booking, with indexes for fromReschedule and originalBookingUid.
  • Set originalBookingUid on new rescheduled bookings (carry forward chain root).
  • Included previousBookingUid in reschedule audit data; emitted RESCHEDULED entries with start/end changes.
  • Hid originalBookingUid in booking API responses.
  • Updated getAuditLogs to fetch logs across the full reschedule chain and filter logs to the reschedule timestamp for superseded bookings.
  • Skipped auth and email verification for reschedules, with validation that rescheduleUid exists, is ACCEPTED or PENDING, and matches the same event type.

• Migration

  • Run scripts/backfill-original-booking-id.ts to populate original booking roots for existing bookings (supports --dry-run).

^{Written for commit 95d4007. Summary will update automatically on new commits.}

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2 Skipped Deployments

Project	Deployment	Preview	Comments	Updated (UTC)
cal	Ignored			Nov 14, 2025 6:36am
cal-eu	Ignored			Nov 14, 2025 6:36am

[github-actions]

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[hariombalhara]

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This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
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• feat:[Booking Audit Stack - 4] Implement audit log reschedule handling #24902 👈 (View in Graphite)
• feat: [Booking Audit Stack - 3] Integrate Booking Audit Action services  #25125 : 1 other dependent PR (#25470 )
• feat: Add support to audit and view audit log with Booking CREATED action #25468
• main

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