[Tagging] Automatically add system tags for Organization

[pomegranited]

Story

"As a content author, I want the system to maintain automatic tags on my content so that I don't have to perform these tasks manually when creating/updating content."

Full description

Follow up to

• [Tagging] Implement System Tagging data architecture models #77
• [Tagging] Implement content event signals #78

Implement automatic tagging for the system taxonomies defined in the MVP. These tags should be created/updated automatically from the content itself, triggered by the create/update events for courses, blocks, libraries, and library blocks provided by #78

Completion criteria

• PR against edx-platform which addresses the behavioral specifications below, and adds the requested management command to manually trigger tag creation.
• (Optional) PR against openedx-learning for any logic to extend oel_tagging that may be useful outside of the "content" context.
• Automated testing must cover common paths in behavioral specification.

Behavioral specifications

Organization system taxonomy:

• When the user creates a new course, block, library, or library block:
  • a new ObjectTag for that object is created against the Organization Taxonomy.
    Use the content's {{usage_key.org}} to locate the matching Organization {{short_name}}, and ensure the ObjectTag is linked to that Organization so that changes to the Organization {{name}} will be reflected when fetching the object tag value.
• When the user updates an existing course, block, library, or library block:
  • if the object already has a Organization ObjectTag, no change is made to that tag. (Organization {{name}}s may change, but once content is created in an org, it becomes part of the identifying usage key, and so cannot be changed.)
  • if the object does not have an Organization ObjectTag, one is created against the Organization Taxonomy, same logic as with new objects.
• When the user deletes a course, block, library, or library block:
  • any existing Organization ObjectTags for this object are deleted.
• When an operator runs the "update tags" management command with a given list of course, block, library, or library block IDs, a new Organization ObjectTag is created if one does not already exist.

Documentation updates & improvements criteria

• Ensure that the management command and its options are fully documented.

Relevant repositories

• openedx.features.content_tagging: https://github.com/openedx/edx-platform
• oel_tagging: https://github.com/openedx/openedx-learning
• openedx-events: https://github.com/openedx/openedx-events

[pomegranited]

Note: we may not need these tags at all, as the Organization can be pulled from the object_id usage key, and stored in the search index without the need for tags.

Either way, it's out of scope for MVP.

[bradenmacdonald]

Marking this as closed for now ^
We can re-open if there is some need in the future.