feat(agent): implement proof of request protocols

[goncalo-frade-iohk]

Fixes ATL-2500

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ REPOSITORY	checkov	yes		no	11.18s
✅ REPOSITORY	dustilock	yes		no	0.01s
✅ REPOSITORY	gitleaks	yes		no	4.74s
✅ REPOSITORY	git_diff	yes		no	1.99s
✅ REPOSITORY	secretlint	yes		no	2.96s
✅ REPOSITORY	syft	yes		no	0.66s

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