chore(api): apply rustfmt across modules and tests

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/models.rs

@@ -294,7 +294,8 @@ pub struct CustomerAccountEntry {
     pub created_at: DateTime<Utc>,
 }
 
-pub const CUSTOMER_ACCOUNT_ENTRY_COLUMNS: &str = "id, account_id, delta_minor, balance_minor, reason, reference_type, reference_id, created_at";
+pub const CUSTOMER_ACCOUNT_ENTRY_COLUMNS: &str =
+    "id, account_id, delta_minor, balance_minor, reason, reference_type, reference_id, created_at";
 
 /// Lifecycle of a customer-owned coupon snapshot.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Type)]
@@ -503,8 +504,7 @@ pub struct CollectiveGroupMember {
     pub joined_at: DateTime<Utc>,
 }
 
-pub const COLLECTIVE_GROUP_MEMBER_COLUMNS: &str =
-    "id, group_id, order_id, user_id, joined_at";
+pub const COLLECTIVE_GROUP_MEMBER_COLUMNS: &str = "id, group_id, order_id, user_id, joined_at";
 
 #[derive(Debug, Clone, Serialize, sqlx::FromRow)]
 pub struct AddressBookEntry {