Log every ThriveCart sale to Google Sheets and Slack

Build me a deterministic code workflow that runs every time a new sale happens in ThriveCart, logs the order to a Google Sheet, and posts a real-time alert to a Slack channel.

Trigger: a webhook from ThriveCart for order.success events. On first install, the workflow should call ThriveCart's Create Event Subscription operation to subscribe the workflow's webhook URL to the order.success event so I don't have to set up the subscription by hand.

Steps:

1. Parse the ThriveCart webhook payload and extract: customer name, customer email, product name, order amount (in cents), affiliate name (if any), order ID, and customer country. Convert the amount from cents to dollars (divide by 100, format to 2 decimal places) since ThriveCart returns monetary values in cents.

2. Call Google Sheets Append Values to add a new row to a configurable spreadsheet and tab (default tab name: "Sales Log"). Columns, in order: Date (the order timestamp), Customer, Email, Product, Amount (formatted dollars), Affiliate, Order ID.

3. Call Slack Send a Message to a configurable channel with a tidy summary like: "New sale: $49.99 for Starter Course by Jane Doe (jane@example.com). Order ID: 12345." Include the affiliate name in the message if one is present.

Configuration inputs the user should be able to set: the Google Sheet ID, the tab name, and the Slack channel. Defaults are fine for the tab name.

This is a fixed mapping with no judgement calls, so keep it as a straight-through code workflow with no LLM steps. Handle missing optional fields (like affiliate or country) gracefully so the row and the Slack message still post cleanly.