Method SoftDelete_MarkForDeletion()

SQL to mark objects for soft-deletion.
Creates trash container and moves objects under it.
Params: $1=objectIds (array/comma-separated), $2=userId, $3=trashParentId (nullable)
Returns: trash_id, marked_count
PostgreSQL: SELECT * FROM mark_for_deletion($1, $2, $3)
MSSQL: EXEC sp_mark_for_deletion , , (with OUTPUT params)

string SoftDelete_MarkForDeletion()