fix(objectql,metadata-protocol)!: the per-aggregation filter takes where's remaining doors — a bad date, an addDays numeric pair, an undeclared { $field } and an unknown key are refused; a Date bound compares as an instant

fix(objectql,metadata-protocol)!: the per-aggregation filter takes where's remaining doors — a bad date, an addDays numeric pair, an undeclared { $field } and an unknown key are refused; a Date bound compares as an instant #6885