Deprecated initialize_admin path documentation and guardrails

[Baskarayelu]

Description

Clarify migration from initialize_admin to initialize; add warnings in docs and tests.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Align with existing Soroban contract patterns in quicklendx-contracts

Suggested execution

• Fork the repo and create a branch
• git checkout -b feature/initialize-admin-deprecation
• Implement changes
• Write contract: src/lib.rs, src/admin.rs
• Write comprehensive tests: src/test_admin.rs
• Add documentation: docs/contracts/admin.md
• Include NatSpec-style comments (Rust doc comments on public items)
• Validate security assumptions

Test and commit

• Run tests
• Cover edge cases
• Include test output and security notes

Example commit message

docs: clarify initialize_admin deprecation

Guidelines

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 96 hours

[heymide]

@heymide has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Based on your request, I will implement and fix this issue according to the design requirement and to fit your acceptance criteria

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[drips-wave]

Congratulations, @heymide! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @heymide: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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