test: add comprehensive tests for multi-admin and multisig support

[greatest0fallt1me]

Description:

Write comprehensive test cases for multi-admin and threshold (multisig) behavior.

Requirements and Context:

• Must achieve minimum 95% test coverage
• Should test single admin (threshold 1)
• Should test M-of-N threshold (e.g., 2 of 3)
• Should test add/remove admin and threshold update
• Should test sensitive operations require threshold
• Should test event emission and auth failures

Suggested Execution:

1. Fork the repo and create a branch

   git checkout -b test/multi-admin-multisig-tests

2. Implement changes

   • Write tests: src/test.rs (multi-admin and multisig tests)
   • Validate test coverage

3. Test and commit

   • Run tests with coverage; include test output

Example Commit Message:

test: add comprehensive tests for multi-admin and multisig support

Guidelines:

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 72 hours

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