Support JWT bearer grant type

[reinkrul]

Fixes #3965

[qltysh]

Coverage Impact

⬇️ Merging this pull request will decrease total coverage on master by 0.06%.

Modified Files with Diff Coverage (5)

Rating	File	% Diff	Uncovered Line #s
	auth/auth.go	100.0%
	cmd/root.go	100.0%
	auth/api/iam/api.go	20.0%	238-247, 790-791
	auth/client/iam/openid4vp.go	84.2%	70-83, 261-262, 275-276
	auth/api/iam/jwtbearer.go	0.0%	8-12
	Total	63.5%

🤖 Increase coverage with AI coding...

In the `support-jwtbearer` branch, add test coverage for this new code:

- `auth/api/iam/api.go` -- Lines 238-247 and 790-791
- `auth/api/iam/jwtbearer.go` -- Line 8-12
- `auth/client/iam/openid4vp.go` -- Lines 70-83, 261-262, and 275-276

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• Diff Coverage: Coverage for added or modified lines of code (excludes deleted files). Learn more.

• Total Coverage: Coverage for the whole repository, calculated as the sum of all File Coverage. Learn more.

• File Coverage: Covered Lines divided by Covered Lines plus Missed Lines. (Excludes non-executable lines including blank lines and comments.)

  • Indirect Changes: Changes to File Coverage for files that were not modified in this PR. Learn more.