Consider due expiring charge as unprovisionable

apps/labrinth/src/database/models/charge_item.rs

@@ -240,6 +240,7 @@ impl DBCharge {
                 charge_type = $1 AND
                 (
                     (status = 'cancelled' AND due < NOW()) OR
+                    (status = 'expiring' AND due < NOW()) OR
                     (status = 'failed' AND last_attempt < NOW() - INTERVAL '2 days')
                 )
             "#,

apps/labrinth/src/routes/internal/billing.rs

@@ -2131,7 +2131,11 @@ pub async fn index_subscriptions(pool: PgPool, redis: RedisPool) {
         let mut transaction = pool.begin().await?;
         let mut clear_cache_users = Vec::new();
 
-        // If an active subscription has a canceled charge OR a failed charge more than two days ago, it should be cancelled
+        // If an active subscription has:
+        // - A canceled charge due now
+        // - An expiring charge due now
+        // - A failed charge more than two days ago
+        // It should be unprovisioned.
         let all_charges = DBCharge::get_unprovision(&pool).await?;
 
         let mut all_subscriptions =