Google Structured Data: No description for Oxygen-Sites

**Describe the bug**

Adding a listing in the backend, there is no field to fill in a job description, wich threw an error in the Google Search Console. I suppose, due to this article (https://wpjobmanager.com/document/getting-started/adding-jobs-via-admin/#enter-the-job-title-and-description), that the post content will transfer into the "description" element. However, using the Oxygen Wordpress site builder, this isn't editable, hence no jobs will be posted on Google jobs.

**Screenshots**

**Expected behavior**

one of the two: If no post content is set,
- Either automatically set the job tasks description as the job description
- or add another field in the job data to add a description

**Isolating the problem (mark completed items with an [x]):**
- [ ] I have deactivated other plugins and confirmed this bug occurs when only WP Job Manager plugin is active.
- [ ] This bug happens with a default WordPress theme active.
- [X] I can reproduce this bug consistently using the steps above.

**WordPress Environment**
- WordPress Version: 6.7.2
- WP Job Manager Version: 2.4.0
- PHP Version: 8.1
- Other important details: Oxygen builder

Start by reproducing the backend listing flow with the Oxygen builder and inspect the generated Google structured-data output for a missing description. Compare the behavior with the documented admin job-title and description flow; done means listings created with Oxygen expose a valid job description to Google Jobs when post content is absent.

Written by the indexing model from the issue text.