Function generate_implicit_chunks 

pub fn generate_implicit_chunks(
    base_address: u64,
    dataset_dims: &[u64],
    chunk_dimensions: &[u32],
    element_size: u32,
) -> Vec<ChunkInfo>

Generate ChunkInfo entries for an implicit index (v4 index type 2).

Chunks are stored contiguously starting at base_address. No stored index; addresses are computed from the chunk position.