Function build_live_propfind_item_with_provider 

pub async fn build_live_propfind_item_with_provider<P: DavLivePropertyProvider>(
    provider: &P,
    path: &DavPath,
    href: String,
    snapshot: &DavCapabilitySnapshot,
    request: &DavPropfindRequest,
) -> Result<DavMultiStatusItem, DavLivePropertyEvaluationError>

Fetches one product snapshot and composes a capability-driven PROPFIND item.

Errors

Returns an error when the provider fails or required live-property values are missing.