Add latest_interior_ref_list_by_shop_id endpoint

Not sure if this is correct yet, still waiting for rustc to compile...

src/models/interior_ref_list.rs

@@ -125,3 +125,21 @@ impl Model for InteriorRefList {
         Ok(result)
     }
 }
+
+impl InteriorRefList {
+    #[instrument(level = "debug", skip(db))]
+    pub async fn get_latest_by_shop_id(db: &PgPool, shop_id: i32) -> Result<Self> {
+        sqlx::query_as_unchecked!(
+            Self,
+            "SELECT interior_ref_lists.* FROM interior_ref_lists
+            INNER JOIN shops ON (interior_ref_lists.shop_id = shops.id)
+            WHERE shops.id = $1
+            ORDER BY interior_ref_lists.created_at DESC
+            LIMIT 1",
+            shop_id,
+        )
+        .fetch_one(db)
+        .await
+        .map_err(Error::new)
+    }
+}

src/models/shop.rs

@@ -7,6 +7,7 @@ use tracing::instrument;
 
 use super::ListParams;
 use super::{Model, UpdateableModel};
+use crate::models::InteriorRefList;
 use crate::problem::forbidden_permission;
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -103,7 +104,6 @@ impl Model for Shop {
     }
 }
 
-
 #[async_trait]
 impl UpdateableModel for Shop {
     #[instrument(level = "debug", skip(self, db))]
@@ -132,4 +132,4 @@ impl UpdateableModel for Shop {
             return Err(forbidden_permission());
         }
     }
-}
+}