Add order types

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

src/threads/data/backfill.rs

@@ -6,7 +6,7 @@ use crate::{
         alpaca::{
             self,
             api::{self, outgoing::Sort},
-            Source,
+            shared::Source,
         },
         news::Prediction,
         Backfill, Bar, Class, News,
@@ -248,7 +248,7 @@ impl Handler for BarHandler {
     async fn backfill(&self, symbol: String, fetch_from: OffsetDateTime, fetch_to: OffsetDateTime) {
         info!("Backfilling bars for {}.", symbol);
 
-        let mut bars = Vec::new();
+        let mut bars = vec![];
         let mut next_page_token = None;
 
         loop {
@@ -348,7 +348,7 @@ impl Handler for NewsHandler {
     async fn backfill(&self, symbol: String, fetch_from: OffsetDateTime, fetch_to: OffsetDateTime) {
         info!("Backfilling news for {}.", symbol);
 
-        let mut news = Vec::new();
+        let mut news = vec![];
         let mut next_page_token = None;
 
         loop {