Function render_fragments 

pub async fn render_fragments<C>(
    txn: &C,
    actor_id_counter: &AtomicU32,
    ensembles: Vec<NoShuffleEnsemble>,
    workers: BTreeMap<WorkerId, WorkerInfo>,
    adaptive_parallelism_strategy: AdaptiveParallelismStrategy,
) -> MetaResult<RenderedGraph>
where
    C: ConnectionTrait,

Fragment-scoped rendering entry point used by operational tooling. It validates that the requested fragments are roots of their no-shuffle ensembles, resolves only the metadata required for those components, and then reuses the shared rendering pipeline to materialize actor assignments.