Function materialize_scan 

pub async fn materialize_scan<S: StorageEngine>(
    engine: &LiteQueryEngine<S>,
    collection: &str,
    cursor: &[u8],
    count: usize,
) -> Result<QueryResult, LiteError>

MaterializeScan: cursor-paginated full collection scan for the clone materializer.

Lite is single-node — there is no distributed cursor executor. Instead, every document in the collection is enumerated in insertion order. When cursor is non-empty its bytes are interpreted as the UTF-8 ID of the last-seen document; scanning resumes from the ID that follows it lexicographically. Returns at most count entries per call. When fewer than count entries are returned the next-cursor is empty, signalling scan completion.

The response payload is msgpack-encoded as a 2-element array: [next_cursor: bin, entries: [[doc_id: str, surrogate: u32, value_bytes: bin], ...]] packed into QueryResult { columns: ["payload"], rows: [[Value::Bytes(payload)]] }.