Tighten admin authorization boundaries and governance guardrails

[grantfox-oss]

Reduce privilege drift by consolidating admin authorization logic, clarifying role semantics, and restricting governance-only actions to explicit execution paths.

• Affected files: app/contract/contracts/Folder/src/admin.rs, app/contract/contracts/Folder/src/role_test.rs, app/contract/contracts/Folder/src/lib.rs, app/contract/contracts/Folder/src/guard_test.rs, app/contract/contracts/Folder/src/metadata.rs, app/contract/contracts/Folder/src/storage.rs, app/contract/contracts/Folder/src/test_context.rs, app/contract/README.md
• Acceptance criteria:
  • Admin-only actions follow explicit authorization checks and do not rely on ambient or stale authority state.
  • Governance-specific flows are isolated from routine operational paths and are easier to audit.
  • Security tests validate role checks for normal admin, governance, and unauthorized user paths.

[Qoder-Undefined]

Can i work on this please assign me

[grantfox-oss]

🦊 GrantFox — @Qoder-Undefined has been assigned to this issue as part of the Third Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #561)
2. Your PR will be reviewed by the BlockDash-Studios maintainers

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@Qoder-Undefined's PR #566 was approved and merged by @MaryammAli.

🏆 @Qoder-Undefined: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,108 total points). Track your full progress on GrantFox.

👏 Great work, @Qoder-Undefined! Keep contributing to BlockDash-Studios.