This PR fixes some issues with our previous approach to synching LLM usage over to Stripe. We now have a separate LLM access price in Stripe that is a marker price to allow us to create the initial subscription with that as its subscription item We then dynamically set the LLM usage price during the reconciliation sync based on the usage for the current month. Release Notes: - N/A --------- Co-authored-by: Antonio <antonio@zed.dev> Co-authored-by: Richard <richard@zed.dev>