Implement owner/admin access control and emergency controls

[Divineifed1]

Description: Add a robust access control layer to all contracts using Soroban's Address type and an Authorized trait pattern. Include owner-only functions and an emergency pause mechanism.

Acceptance Criteria:

Base Ownable module with owner: Address set at __constructor or first call
transfer_ownership(new_owner: Address) – owner-only; emits OwnershipTransferred
renounce_ownership() – permanent; sets owner to zero address
Pausable module with paused: bool state
pause() / unpause() – owner-only functions toggling paused state
Critical functions (vote, create_prediction, resolve_prediction) check !paused before execution
_only_owner(caller: Address) internal helper panics with AccessDenied if caller != owner
_only_authorized(caller, authorized_list: Vec

) helper for multi-admin scenarios
All admin functions emit events
Documentation in code comments explaining the AC model

[Silver36-ship-it]

I would love to work on this professionally, please assign it to me

[michaelmbanusi20-dev]

i have carefully gone through the issue and relevant documentation, and i understand the expected implementation. I'd love to work on this task and provide a clean and efficient solution

[Chigybillionz]

Hi, I’ve reviewed this issue and I’m confident I can fix it. I’d like to take it on.

[Clement-coder]

Hello, I'm a Full Stack Blockchain, Mobile, and Software Engineer with experience building scalable applications, smart contracts, APIs, and modern user-focused products.

I've reviewed this issue and understand the requirements and expected outcome. My background allows me to quickly analyze problems, implement efficient solutions, and maintain high code quality throughout development. I'm confident in my ability to deliver a clean, well-tested, and maintainable solution, and I'd be excited to contribute to this project.

[Samuel-21-eng]

i would love to contribute to this

[Menjay7]

Hi! I came across this issue and would love to work on it. I have experience with similar tasks and I'm confident I can investigate, implement a clean solution, and thoroughly test it before submitting a PR. If the issue is still open, I would appreciate it if you could assign it to me. Thank you!

[barry01-hash]

My chief, i will love to work on this issue

[barry01-hash]

My chief, i will love to work on this issue

[barry01-hash]

My chief, i will love to work on this issue

[Godsmiracle001]

Hello maintainer can i fix this?

[grantfox-oss]

🦊 GrantFox — @Godsmiracle001 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 #5)
2. Your PR will be reviewed by the Exquisify maintainers

Good luck! Track your progress on GrantFox.