feat(agent): add new agent derivation path

[goncalo-frade-iohk]

Checklist:

• [x] My PR follows the contribution guidelines of this project
• [x] My PR is free of third-party dependencies that don't comply with the Allowlist
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] I have checked the PR title to follow the conventional commit specification

[coveralls]

Pull Request Test Coverage Report for Build 9807151893

Details

• 105 of 138 (76.09%) changed or added relevant lines in 13 files are covered.
• 4 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.3%) to 41.835%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
EdgeAgentSDK/Apollo/Sources/Model/Ed25519Key.swift	5	6	83.33%
EdgeAgentSDK/Apollo/Sources/Model/Secp256k1Key.swift	1	2	50.0%
EdgeAgentSDK/Apollo/Sources/Model/X25519Key.swift	5	6	83.33%
EdgeAgentSDK/Apollo/Sources/ApolloImpl+Public.swift	0	3	0.0%
EdgeAgentSDK/Apollo/Sources/Operations/CreateEd25519KeyPairOperation.swift	3	7	42.86%
EdgeAgentSDK/Apollo/Sources/ApolloImpl+KeyRestoration.swift	24	30	80.0%
EdgeAgentSDK/Domain/Sources/Models/KeyManagement/DerivableKey.swift	32	49	65.31%
<!--	Total:	105	138	76.09%	-->

Files with Coverage Reduction	New Missed Lines	%
EdgeAgentSDK/Apollo/Sources/ApolloImpl+Public.swift	1	68.83%
EdgeAgentSDK/Apollo/Sources/Operations/CreateEd25519KeyPairOperation.swift	1	48.0%
EdgeAgentSDK/Apollo/Sources/ApolloImpl+KeyRestoration.swift	2	52.5%
<!--	Total:	4		-->

Totals
Change from base Build 9807019801:	0.3%
Covered Lines:	4883
Relevant Lines:	11672

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💛 - Coveralls