- Added support for tiered billing expressions in the billing system.
- Introduced new types and functions for handling billing expressions, including caching and execution.
- Updated existing billing logic to accommodate tiered billing scenarios.
- Enhanced request handling to support incoming billing expression requests.
- Added tests for tiered billing functionality to ensure correctness.
Keep the model pricing editor wording aligned with the new price-based UI while exposing cache, image, and audio pricing in the marketplace so users can see the full configured pricing model.