Description

Implement a feature that allows scheduling of publishing tasks in the future using Cloud Tasks. This will enable documents to be published automatically at a specified date and time.

This issue depends on #382

Requirements

1. Scheduling Publish Tasks:

   • Allow users to schedule a publish task for a document by selecting a future date and time.
   • Use Cloud Tasks to handle the scheduling and execution of these publish tasks.

2. Cloud Function Integration:

   • Create a Cloud Function that triggers when a document's publishedAt attribute is set to a future date.
   • This Cloud Function should create a Cloud Task that will execute at the specified publishedAt time.
   • When the task is executed, the document should be published by copying data to the public collections such as described in Cloud Function for Publishing Documents to Public Collection #382

3. Restrict Dates too far in the future:

   • The cloud tasks seem only support 720 hours in the future dates of execution
     • https://stackoverflow.com/questions/68723613/whats-the-best-solution-to-execute-scheduled-tasks-for-later
     • https://stackoverflow.com/questions/66791929/is-there-any-way-to-set-the-max-schedule-time-for-google-cloud-tasks-to-more-tha
   • Normalize the "scheduled date" to be maximum "server time + 720 hours"