chore: Add support dpop_signing_alg for OIDC/Okta connections (GA)

[ankita10119]

🔧 Changes

DPoP GA - OIDC/Okta connections (connections.ts)

• Added ES384 and ES512 as valid values for dpop_signing_alg in the connection options schema, alongside the existing ES256 and Ed25519, reflecting the General Availability of these algorithms in the Auth0 API for oidc and okta connection strategies.
• No dependency on node-auth0 for this change - the enum is defined inline since ConnectionDpopSigningAlgEnum in node-auth0 predates the GA additions and does not yet include these values.

📚 References

• DPoP GA API spec: POST /v2/connections, PATCH /v2/connections/{id}, GET /v2/connections

🔬 Testing

• Extended the existing #connections schema unit test to validate ES384 and ES512 are accepted as valid dpop_signing_alg values on oidc strategy connections.
  • All 1231 existing tests pass with no regressions.

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.86%. Comparing base (0326e38) to head (b053b8a).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1391   +/-   ##
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  Coverage   79.86%   79.86%           
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  Files         153      153           
  Lines        7064     7064           
  Branches     1550     1550           
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  Hits         5642     5642           
  Misses        781      781           
  Partials      641      641           

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[kushalshit27]

LGTM