Add pipelined backfilling

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/database/backfills_news.rs

@@ -1,13 +1,13 @@
 use std::sync::Arc;
 
 use crate::{
-    cleanup, delete_where_symbols, optimize, select_where_symbols, types::Backfill, upsert,
+    cleanup, delete_where_symbols, optimize, select_where_symbols, types::Backfill, upsert_batch,
 };
 use clickhouse::{error::Error, Client};
 use tokio::sync::Semaphore;
 
 select_where_symbols!(Backfill, "backfills_news");
-upsert!(Backfill, "backfills_news");
+upsert_batch!(Backfill, "backfills_news");
 delete_where_symbols!("backfills_news");
 cleanup!("backfills_news");
 optimize!("backfills_news");