Assign a LearningResourceDepartment, LearningResourceDLC to resources when appropriate

[mbertrand]

User Story

As a podcast listener, I would like to know which MIT Department (or DLC - Lab/Center/Institute), if any, produces each podcast.
Ditto for other learning resources where applicable.

Description/Context

• Create a new LearningResourceDLC class with fields like name and maybe dlc_id, url - similar to LearningResourceDepartment. Add to LearningResource class as a nullable field (dlc?) via foreign key.
• Assign department and/or DLC (if any) as part of the ETL process - extract from the catalog API response if present.

Acceptance Criteria

• The yaml files for podcasts have fields for offered_by, department, and dlc where applicable
• LearningResources will have a non-null department and DLC where applicable

Plan/Design

• Create a new LearningResourceDLC class with fields like name and maybe dlc_id, url - similar to LearningResourceDepartment. Add to LearningResource class as a nullable field (dlc?) via foreign key.
• Assign department and/or DLC where applicable as part of the ETL process - extract from the catalog API response if present.
• Update the podcast yaml files to include fields for offered_by, department, and dlc where applicable
• Out of scope (issue per app): update each online app's catalog API response to include these field where applicable, otherwise they will be assumed to be null.

[mbertrand]

@pdpinch @Ferdi regarding this:

The yaml files for podcasts have fields for offered_by, department, and dlc where applicable

How to determine which podcast is offered by which department/DLC, is there a central source for this info?