Increase Test Coverage and Add Elasticsearch Integration Tests with Mocking

Description

Implementation for this is required, especially for edge cases and error handling. In particular, we need integration tests for logging to Elasticsearch. These tests should mock the Elasticsearch client or HTTP requests to avoid requiring a real Elasticsearch instance during testing.

Tasks

• Review current test coverage and identify untested edge cases and error handling paths.
• Add or update tests in the tests folder to mock Elasticsearch integration.
  • Use unittest.mock or pytest-mock to mock the Elasticsearch client or HTTP requests.
• Ensure tests verify both successful logging and error handling when Elasticsearch is unavailable or returns errors.