Add unit test for SuperkeyWorker to handle missing configuration key

[Nitanshu715]

Description

I would like to contribute a new unit test for the SuperkeyWorker component in this repository. The test will cover the scenario where a required configuration key is missing (or mis-typed) in the environment or config file, verifying that the worker starts with an appropriate error message or fallback behavior.

Proposed changes

• Add a new test file in worker/superkey (or equivalent) named missing_config_key_test.go.
• In the test: mock the configuration loader, simulate missing key, assert the worker fails safely or logs the error.
• Ensure the test uses the existing test framework, conforms to style guidelines, and runs with go test.
• Update documentation if needed: mention the scenario in README or comment.

Why this task is needed

Handling configuration errors is critical for production stability. This addition will improve coverage and help ensure that the worker behaves predictably under mis-configuration.

Assigning

I’m participating in Hacktoberfest 2025 and would appreciate if this could be assigned to me. Thanks!