Issue Summary
When a gift card completely covers the initial subscription order in WooCommerce, the order never transitions to a "paid" status. As a result, the subscription remains stuck in a "pending payment" state, preventing it from becoming active.

Affected Versions
WooCommerce Subscriptions: All
Gift Cards for WooCommerce: All
WordPress: All

Steps to Reproduce

1. Add a subscription product to the cart.
2. Apply a gift card that fully covers the initial subscription cost.
3. Proceed to checkout and complete the order.

Expected Behavior

• The initial order should be recognized as fully paid.
• The subscription should transition to an active state.

Actual Behavior

• The subscription remains stuck in "pending payment" indefinitely.