Unified Configuration Backend

Artifex uses one configuration backend across the repo:

• frozen dataclass runtime configs
• typed retained template documents
• shared from_dict() / from_yaml() materialization

The old unified.py-style catch-all module is not the supported contract. Use:

• artifex.configs for public imports
• artifex.generative_models.core.configuration for the reviewed runtime package surface

For the current config guide, see:

• docs/configs/index.md
• docs/user-guide/training/configuration.md