fix: use course-run specific metadata

[hamzawaleed01]

Description:
Add a description of your changes here.

Jira:
ENT-9890

Merge checklist:

• ./manage.py makemigrations has been run
  • Note: This must be run if you modified any models.
    • It may or may not make a migration depending on exactly what you modified, but it should still be run.

Post merge:

• Ensure that your changes went out to the stage instance
• Deploy to prod instance

[adamstankiewicz]

nit: could opt to use next to extract the desired course run, if you wanted. might be a bit more "pythonic", e.g.:

course_run = next((run for run in course_runs if run.get('key') == preferred_course_run_key), None)
if not course_run:
    logger.warning(
        'Course run metadata not found for preferred course run key %s in content metadata %s', 
        preferred_course_run_key,
        content_metadata.get('key'),
    )
    return course_run

(Opted to add logging when the preferred_course_run_key is not found in the list of course_runs).

[brobro10000]

Great job with the abstraction with a few suggestions.

[hamzawaleed01]

Hey @brobro10000 @adamstankiewicz , thanks for the awesome insights! ❤️

I've resolved the comments I was sure about and left the rest for you folks to review.

[brobro10000]

There is one final optimization that can be included to avoid a potential None value return for content metadata.

[brobro10000]

Great job 👍🏽