Function generate_process_jit_partitions_segment 

pub fn generate_process_jit_partitions_segment(
    config: &JitPartitionConfig,
    lakehouse: Arc<LakehouseContext>,
    blocks_view: &BlocksView,
    partitions: &PartitionCache,
    insert_time_range: &TimeRange,
    process: Arc<ProcessMetadata>,
    stream_tag: &str,
) -> impl Future<Output = Result<Vec<SourceDataBlocksInMemory>, Error>>

Generates a segment of JIT partitions filtered by process.