feat(media): introduce MediaRouter and stubs for image and speech generation

feat: update agent personas and scheduling in YAML configurations; enhance event handling and memory deduplication in core logic

feat: require live infrastructure for event store and inference, removing offline mode

feat: Enhance model routing and deployment flexibility

feat: lower scenario budget caps for live-safe runs

feat: unify model catalogue and self-hosted routing

Refactor code structure for improved readability and maintainability