The code in the webhook API has been refactored to move the DatabaseWebhookHandlerService instance out of the POST function scope. Furthermore, the display of renewal plan details on the billing page has been simplified and certain parts deemed superfluous have been removed. Numerous types and interfaces in the database.types.ts file have also been corrected and formatted for consistency and improved readability.
This commit updates various components in the billing flow due to a new schema that supports multiple line items per plan. The added flexibility rendered 'line-items-mapper.ts' redundant, which has been removed. Additionally, webhooks have been created for handling account membership insertions and deletions, as well as handling subscription deletions when an account is deleted. This message also introduces a new service to handle sending out invitation emails. Lastly, the validation of the billing provider has been improved for increased security and stability.
