feat: improve session renewal

[wilsonrivera]

Summary by CodeRabbit

• Bug Fixes
  • Improved session renewal reliability by adding a 5-minute grace period to token expiration checks.
  • Ensured proper handling when the refresh token is missing, providing clearer authentication error messages.
  • Corrected token decoding logic for session refresh.
  • Updated new session tokens to include additional user information.

Checklist

• I have discussed my proposed changes in an issue and have received approval to proceed.
• I have followed the coding standards of the project.
• Tests or benchmarks have been added or updated.
• Documentation has been updated on https://github.com/wundergraph/cosmo-docs.
• I have read the Contributors Guide.

[coderabbitai]

Walkthrough

The renewSession method in the authentication utility was updated to introduce a 5-minute expiration skew for token expiration checks, enforce the presence of a refresh token, correct the decoding logic for refresh tokens, and add an iss field to the new JWT payload using the user's ID. No exported or public entity signatures were changed.

Changes

Cohort / File(s)	Change Summary
Auth Session Renewal Logic controlplane/src/core/auth-utils.ts	Modified renewSession to add a 5-minute expiration skew, require refresh token, fix refresh token decoding, and include iss field in new JWT payload.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

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📒 Files selected for processing (1)

• controlplane/src/core/auth-utils.ts (3 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• controlplane/src/core/auth-utils.ts

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[StarpTech]

LGTM