As a Node team engineer, I want to extend the ContainerRuntimeConfig API with additional storage configuration fields, so that cluster administrators can declaratively configure layer stores, image stores, and artifact stores for CRI-O.

Details

Extend the ContainerRuntimeConfig API in openshift/api to support advanced container storage configuration:

• additionalLayerStores - Array of layer store configurations with path field (max 5 entries)
• additionalImageStores - Array of image store configurations with path field (max 10 entries)
• additionalArtifactStores - Array of artifact store configurations with path and optional filter fields (max 10 entries)

The API extension must support path-based configuration with FUSE filesystem interface and graceful fallback.

Acceptance Criteria

• API types defined in openshift/api repository
• ContainerRuntimeConfig extended with additionalLayerStores, additionalImageStores, and additionalArtifactStores fields
• Maximum entry limits enforced (5 for layer stores, 10 for image/artifact stores)
• API validation rules implemented
• API documentation and comments added
• PR merged to openshift/api
• API changes available for MCO implementation