Refactor imports and enhance timestamp handling in API and test files
- Removed redundant import statements in api.py and prepare_worker.py for cleaner code.
- Updated timestamp format in test cases to include timezone information for consistency.
- Adjusted test configurations to align with new API structure for improved accuracy in data handling.
Enhance Activities and API Integration
- Updated Activities class to include API operations for external data ingestion.
- Added API configuration builder to connectors_config.py for environment variable management.
- Integrated API configuration into worker setup.
- Expanded unit tests to cover new API functionality and configuration handling.
- Updated requirements.txt to include pycurl and prometheus-client for enhanced metrics support.
