CODEOWNERS + required review on contracts/**

[Jaydbrown]

Require a maintainer review for any change under contracts/; the #373 incident merged mangled code with an admin override and no review.

[Emmanuel-Ugochukwu1]

HI maintainer, please I'd love to work on this issue.

[ZacLou]

I'd like to work on this issue. I have relevant experience with this tech stack and can deliver a clean, well-tested PR. I can submit within 1-2 days.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@ZacLou's PR #514 was approved and merged by @Jaydbrown.

🏆 @ZacLou: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (433 total points). Track your full progress on GrantFox.

👏 Great work, @ZacLou! Keep contributing to conduit-protocol.