fix#15246
#### PR Dependency Tree
* **PR #15247** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved consistency when issuing and validating MCP credential tokens
by using a shared token prefix across issuance and parsing.
* Preserved correct recognition of standard JWT-based authentication
tokens.
* **Tests**
* Updated MCP credentials coverage to validate behavior through the HTTP
API response (instead of direct controller invocation).
* Adjusted workspace quota e2e setup to derive restricted limits via
entitlements before reconciling quota state.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
a6b00a93c0