Request a product review a few days after delivery

A store owner describes their process like this: "Three days after an order is
delivered, I want an email sent asking the customer to leave a review, with a direct
link to the product review form, but I don't want to ask again if they already left
one."

AVAILABLE TOOLS: [WooCommerce + ShipStation delivery webhook (trigger), Uncanny
Automator, email/SMTP, WooCommerce product reviews]

Turn this into an implementation-ready automation recipe, thinking through what the
plain description leaves ambiguous:
1. Trigger: "three days after delivery" needs an actual delivery-confirmed timestamp
   from the carrier webhook, not the order date, since ship times vary. Decide what
   happens if the carrier never sends a delivery-confirmed event at all, which
   carriers sometimes fail to do.
2. Conditions: for an order with five different products, decide whether one review
   request email covers all five items with individual review links, or five separate
   emails, and justify the choice against likely open and unsubscribe rates.
3. Actions in order: check for an existing review from that customer on that product
   before sending (to satisfy the "don't ask again" rule), then send the templated
   email with the review link, then log the send so a manual resend doesn't
   double-email the customer.
4. Failure handling: if the delivery webhook never fires for an order (lost in
   transit, or the carrier integration drops the event), should there be a fallback
   timer based on estimated delivery date plus a buffer, so the request still goes
   out eventually.
5. One edge case specific to this exact workflow: an order that was partially
   refunded or returned before the three-day window closes. Decide whether the review
   request should still go out for the item that was kept.

Replace the workflow description and available tools with your own.