Expand Test Suite to Cover Edge Cases and Error Handling

[darielnoel]

We need to enhance our test suite to cover more comprehensive scenarios beyond the happy path. This involves adding tests for edge cases, error handling, and failure scenarios to ensure our framework behaves as expected under various conditions.

#31

Problem to Solve:
Currently, our test suite primarily verifies the optimal operation scenarios. However, to ensure reliability and robustness, we need to validate how AgenticJS handles unexpected inputs, system stress, and failure modes.