- adds last9 log drain to the UI (flagged)
- updates API Types
## To test
- go to last9
- create project
- select oltp
- grab creds
- go to log drains
- create last9 log drain
- paste creds
- after a few minutes last9 should start showing supabase logs like this
<img width="2042" height="1632" alt="CleanShot 2026-02-05 at 13 17
19@2x"
src="https://github.com/user-attachments/assets/9abc34f7-58ea-431c-9b56-5448fc9e76fd"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Last9 observability integration: new log drain destination with region
selection, credentials UI, feature-flag gating, and icon
* Just-in-time (JIT) access configuration at the project level
* Plan features API to retrieve plan-specific feature configurations
* **Improvements**
* Backend/provider support expanded to include Last9 and OTLP
* Telemetry events updated to include Last9 and OTLP destinations
* Credit redemption response updated; preview endpoint removed
<!-- end of auto-generated comment: release notes by coderabbit.ai -->