| Column | Type | Actions |
|---|---|---|
| id | int(11) | |
| module | enum('designer_task','campaign_update','campaign_complete','video_update') | |
| ref_id | int(11) | |
| action | enum('submitted','approved','rejected','revision') | |
| actor_type | enum('manager','employee','hr') | |
| actor_id | int(11) | |
| note | text | |
| created_at | timestamp |