[Storage] Create Storage Keys Enum

[Eniola3321]

Create a centralized enum that defines all storage keys used throughout the contract.

Acceptance Criteria
Create StorageKey enum
Prevent duplicate keys
Document each key

[vstudio79]

@vstudio79 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi can I be assigned to this issue?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @vstudio79 to this issue.

[vincentokoye953-gif]

@vincentokoye953-gif has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I would like to apply for this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @vincentokoye953-gif to this issue.

[OtowoSamuel]

@OtowoSamuel has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I would love to work on this!

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

[grantfox-oss]

🦊 GrantFox — @OtowoSamuel has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #491)
2. Your PR will be reviewed by the ANYTECHS maintainers

Good luck! Track your progress on GrantFox.

[drips-wave]

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

🧑‍💻 @OtowoSamuel: 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.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[grantfox-oss]

🦊 GrantFox — @OtowoSamuel has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #491)
2. Your PR will be reviewed by the ANYTECHS maintainers

Good luck! Track your progress on GrantFox.

[drips-wave]

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

🧑‍💻 @OtowoSamuel: 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.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊