📝 Description

Write dedicated unit tests for contract_core/auth.rs — the shared auth middleware used by every write function in the contract.

✅ Requirements

In gateway-contract/contracts/core_contract/src/test.rs:

• test_require_owner_succeeds_for_owner — owner calls a write function, no panic
• test_require_owner_panics_for_non_owner — non-owner caller panics with auth error
• test_require_owner_panics_if_uninitialized — calling before init panics with "Contract not initialized"

🎯 Acceptance Criteria

• All 3 tests pass
• cargo test green
• Tests use env.mock_all_auths() where appropriate

📁 Expected files to change/structure

• gateway-contract/contracts/core_contract/src/test.rs — new file

🌿 Branch: test/contract-auth | Priority: MED | Difficulty: ☕ easy