lib/project_config/project_config.ts Added the Region type and default region assignment lib/project_config/project_config.spec.ts Added tests verifying region defaulting and parsing lib/event_processor/event_builder/user_event.ts Included region in event context and equality checks lib/event_processor/event_builder/user_event.tests.js Added region to test event objects lib/event_processor/event_builder/log_event.ts Updated log event construction to use region-specific URLs lib/event_processor/event_builder/log_event.spec.ts Added tests for verifying the correct logx endpoint selection