* feat: removed created by and created_at as readonly fields from issue serializers
* feat: modified serializers for accepting created_by, and changed workspacememberendpoint to projectmemberendpoint
* fix: code suggestions
* chore: resolved code review
* chore: removed unused imports
* fix: passed default user if created_by is absent, and permission classes
* fix: default value for the issue creation
* dev: fix nomenclature
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Co-authored-by: pablohashescobar <nikhilschacko@gmail.com>