Implement Contract Upgradeability Pattern

[Yunusabdul38]

Description

Implement a secure pattern for contract logic upgrades using env.deployer().update_current_contract_wasm. This is essential for fixing bugs or adding features after the initial deployment.

Tasks

• Add an authorized upgrade function.
• Ensure the admin role is the only one capable of triggering an upgrade.
• Implement state migration verification logic to run post-upgrade.

Dependencies

• Issue Refine Role-Based Access Control Patterns #303
• Issue Audit and Harden State Transitions #330

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[abdegenius]

@abdegenius has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I will love to work on this issue

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[DavisVT]

@DavisVT has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I would like to work on implementing the contract upgradeability pattern for predifi.
I have experience designing secure upgrade mechanisms and access-controlled contract logic. I will implement an authorized upgrade function using env.deployer().update_current_contract_wasm, restrict execution strictly to the admin role, and add post-upgrade state migration verification to ensure data integrity and consistency.

I will review Issues #303 and #330 to ensure proper alignment before beginning implementation.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @DavisVT to this issue.