feat: [FC-7879] add management command to backfill ContentDate model…

[andrii-hantkovskyi]

… with existing assignments

NOTE: Depends on: openedx/edx-when#325

Description

This PR adds a new Django management command seed_content_dates that extracts assignment due dates from the modulestore and populates the ContentDate table in the edx-when service.

Key Features

• Command: python manage.py lms seed_content_dates
• Backfills assignment due dates into ContentDate from course assignments in the modulestore.

Options

• --course-id: Seed a specific course.
• --org: Seed all courses for a specific organization.
• --dry-run: Simulate processing without writing to the database.
• --force-update: Overwrite existing ContentDate records instead of skipping.
• --batch-size: Process assignments in batches (default: 100).

Example Usage

# Dry run for all courses
python manage.py lms seed_content_dates --dry-run

# Process a specific course
python manage.py lms seed_content_dates --course-id "course-v1:MITx+6.00x+2023_Fall"

# Process all courses for an organization
python manage.py lms seed_content_dates --org "MITx"

# Force update existing records
python manage.py lms seed_content_dates --force-update

[openedx-webhooks]

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