v0.4.5

A patch. Nothing in the harness changed and no published engine number moves.

The one thing in it is the planner pair on ClickBench, measured again because tamnd/firepanda#680 landed and five more of the 43 go through the planner than did when the table was published. 38 of the 43 run both ways now, the two routes agree on all 38, and the factor is 1.87 against the 1.67 that was there. The five that were added are the whole of that move: they come to 2.9 where the other 33 come to 1.70, and the reason is that each conjunct becomes a physical filter that copies its survivors, so six predicates means six gathers where the hand written port builds one mask and gathers once. That is tamnd/firepanda#521 rather than anything the planner decided.