Add internal issue api

[gunjyo0817]

Type of changes

• Feature

Purpose

Create internal issue API for the recommendation system

• Add /api/internal/issues to get all internal issue information
• Add /api/internal/issues/{issueId} to get specific internal issue information by issue ID

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ JAVA	checkstyle	7		0	2.01s
✅ REPOSITORY	dustilock	yes		no	0.01s
✅ REPOSITORY	gitleaks	yes		no	1.28s
✅ REPOSITORY	git_diff	yes		no	0.02s
✅ REPOSITORY	grype	yes		no	11.6s
✅ REPOSITORY	secretlint	yes		no	2.19s
✅ REPOSITORY	syft	yes		no	2.35s
✅ REPOSITORY	trivy-sbom	yes		no	0.15s
✅ REPOSITORY	trufflehog	yes		no	3.89s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff