[TASK]: Upgrade Scalar

## 🏗️ Technical Scope & Approach
Scalar is used to render and interact with the OAS based API specification for a service.
Upgrading Scalar provides new capabilities, while maintaining the support for older specs.

## 🌋 High Blast Radius Checklist
- [x] **API Impact:** Open API contract updated and validated
- ~~[ ] **Environment Impact:** New Cloud Run env variables or GCP secrets documented~~
- [x] **Automated Testing:** Unit/Integration test scripts written to verify the structural shift

Start by locating the Scalar integration and the existing unit or integration test scripts mentioned in the issue. Confirm the upgrade preserves support for older OpenAPI specifications and that the API contract and automated tests remain valid.

Written by the indexing model from the issue text.