How long the attachment is retrievable on invoices

Dear Team,

We have been utilizing the attachment feature within Oracle Cloud to attach supporting documents and additional information to our invoices. However, we need clarification regarding how long these attachments remain retrievable within the system.

Could you please provide detailed information on the following:

1. What is the standard retention period for attachments on invoices stored in Oracle Cloud?

2. Is there a specific time frame after which attachments are automatically purged from the system?

3. If attachments are removed after a certain period, is there an option or feature available to extend the retention period or archive attachments for future reference?