chore: unify ckd and sign sandbox tests

[kevindeforth]

resolves #1684

[gilcu3]

Thank you, LGTM! Left a few comments/nits

[gilcu3]

Thank you! Left a nit/fix

[Copilot]

Pull request overview

This PR successfully unifies the CKD and Sign sandbox tests by:

• Deleting the redundant sandbox/ckd.rs file
• Extending sign.rs to test all signature schemes including BLS12381 (CKD domain)
• Creating a DomainResponseTest enum to handle both Sign and CKD test types
• Refactoring helper functions to work with all domain types
• Moving common utilities to appropriate locations

Changes:

• Introduced DomainResponseTest enum to unify Sign and CKD test handling
• Updated all sign tests to iterate over all signature schemes instead of just non-CKD schemes
• Refactored test generation to use randomized inputs instead of hardcoded values
• Moved create_account_given_id helper function from ckd.rs to common.rs for shared use

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
crates/contract/tests/sandbox/mod.rs	Removed the ckd module declaration
crates/contract/tests/sandbox/ckd.rs	Deleted entire file (374 lines) - tests migrated to sign.rs
crates/contract/tests/sandbox/sign.rs	Updated tests to cover all signature schemes; split single test into multiple focused tests; added CKD domain testing
crates/contract/tests/sandbox/common.rs	Added create_account_given_id helper function moved from deleted ckd.rs
crates/contract/tests/sandbox/utils/sign_utils.rs	Major refactoring: added DomainResponseTest enum, CKDRequestTest struct, trait ContractQueueRequest; made several functions private; removed unused imports
crates/contract/tests/sandbox/upgrade_to_current_contract.rs	Updated to use new CKDResponseArgs wrapper structure

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[pbeza]

@kevindeforth Sorry, I got caught up fixing my PRs. I’ll review it early tomorrow morning.