Method SoftDelete_GetOrphanedTasks()

SQL query to get orphaned deletion tasks (for recovery at startup).
Returns 'pending' tasks OR 'running' tasks where _date_modify older than timeout.
CLUSTER-SAFE: Only returns tasks that are likely abandoned.
Params: $1=timeoutMinutes (int)
Returns: trash_id, total, deleted, status, owner_id

string SoftDelete_GetOrphanedTasks()