• Fix: Batch-delete partitioned tables before org/project/issue cascade delete to avoid exhausting PostgreSQL shared lock table
  
• Fix: Break infinite loop in release cleanup when concurrent FK insert causes repeated IntegrityError
  
• Fix: Break infinite loop in issue cleanup on IntegrityError (same pattern as release cleanup)
  
• Fix: Project deletion now correctly awaits async batch-delete functions (previously created coroutines that were never awaited)