Merge branch 'CHAOS-678-publish-campaign' of github.com:devsoc-unsw/chaos into CHAOS-678-publish-campaign

Author: Plebbaroni

backend/server/src/models/campaign.rs

@@ -749,6 +749,14 @@ impl CampaignAttachment {
 
     /// Deletes an attachment. Returns BadRequest if campaign is published.
     /// Returns (organisation_id, campaign_id) for the caller to build storage path.
+    /// # Arguments
+    /// 
+    /// * `attachment_id` - ID of the attachment to delete
+    /// * `transaction` - Database transaction to use
+    /// 
+    /// # Returns
+    /// 
+    /// * `Result<i64, ChaosError>` - The ID of the deleted attachment or error if not found
     pub async fn delete(
         attachment_id: i64,
         transaction: &mut Transaction<'_, Postgres>,
@@ -820,4 +828,4 @@ impl CampaignUpdate {
         // TODO: update to ensure one day apart min to match frontend
         Ok(())
     }
-}
+}