Improve test reliability and add force exit option

[robgruen]

This pull request includes improvements to the test harness reliability and test data, as well as a minor update to the test script configuration. The main focus is to ensure test isolation and prevent interference from other running instances during testing.

Test harness reliability and isolation:

• Updated the agent server startup logic in index.ts to never probe for a running agent server when in test mode (--test), ensuring that each test run uses its own isolated instance and does not accidentally connect to a pre-existing server.

Test data maintenance:

• Simplified a test case in translate-history-e2e.json by removing the unused internetLookups field from the parameters object, likely to reflect changes in expected behavior or schema.

Test script configuration:

• Added the --forceExit flag to the test:live script in package.json to ensure that Jest exits cleanly after tests complete, preventing hanging processes during live testing.