* fix: update API endpoint to return task due time for future scheduled tasks
* test: updated InstructorEmailContentList tests to accomodate changes
* fix: returend unformatted created date to support easy conversion at frontend
* test: updated tests to accommodate unformatted date value in API response
* refactor: removed duplicate code and use of random numbers
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Co-authored-by: eemaanamir <eemaan.amir@gmail.com>