## Summary
- track cloud plan activation conversions when an attributed account
moves from the configured default cloud plan to a paid plan
- use the Stripe webhook event time as the activation timestamp so the
30-day signup attribution window reflects the actual upgrade event
- send the Stripe subscription amount and currency for the conversion
value
- mark the account attribution after enqueueing so later plan updates do
not send duplicate activation conversions
## Notes
- Marketing tracker: https://linear.app/chatwoot/issue/MAR-113
- Cloud implementation: https://linear.app/chatwoot/issue/LEA-34
- Stripe billing stays responsible for subscription state and value
calculation.
- Cloud plan activation conversion tracking is handled by a small
dedicated service that owns the activation rule, duplicate marker, and
conversion enqueue.
- Website attribution cookie capture remains separate in the marketing
attribution service.
- There is no frontend change and no new user-facing configuration.
- Conversion upload still no-ops outside Chatwoot Cloud and when
attribution has no supported click identifier.
