* feat: add seat tracking infrastructure for monthly proration
Add seat change logging infrastructure with operationId for idempotency.
This PR adds the foundation for monthly proration billing by tracking
seat additions and removals, gated behind the monthly-proration feature flag.
- Add operationId field to SeatChangeLog for idempotency
- Update SeatChangeLogRepository to support upsert with operationId
- Add feature flag guard in SeatChangeTrackingService
- Integrate seat tracking in team member invites
- Integrate seat tracking in bulk user deletions
- Integrate seat tracking in team service operations
- Integrate seat tracking in DSYNC user creation
When monthly-proration feature flag is disabled, seat logging is skipped
and behavior remains unchanged.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
* feat: add monthly proration processing
Add monthly proration billing processing that works on top of the seat
tracking infrastructure. This PR implements the core proration logic,
webhook handlers, and integration with Stripe billing.
- Enhance MonthlyProrationService to process seat change logs
- Add payment webhook handlers (invoice.payment_succeeded, invoice.payment_failed)
- Update subscription webhook to sync billing period on renewals
- Update TeamBillingService to skip real-time updates when proration enabled
- Enhance StripeBillingService with proration capabilities
- Add Tasker enhancements for processing queues
- Update team creation/upgrade routes
Depends on: feat/monthly-proration-seat-tracking
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
* fix: remove unused logger from SeatChangeTrackingService
* fix: description for calculation
* fix null check on trial
* chore: no more prisma calls
* add feature flag check
* fix stub
---------
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
