Repair uneven-row behavior across petl's existing sort-based and hash-based relational join implementations.

Repair uneven-row behavior across petl's existing sort-based and hash-based relational join implementations.: a task in MiMo-V2.6-RL-harbor-terminal: MiMo-V2.6-RL Terminal (Harbor) (Harbor dataset). An ETL pipeline built on the frozen petl tree in /app/vendor/petl receives iterable tables whose…