ObjectSizeGreaterThan is a strict > gate (filterAllows uses
ev.Size <= rule.FilterSizeGreaterThan to reject). Pinned at the
boundary: an object whose size equals the threshold must remain;
only an object strictly larger expires. Catches a > vs >= flip.
Two backdated objects on the same prefix, sizes 100 and 150 with
threshold=100 — boundary survives, larger expires.
Chris Lu
4aa1c2fb1b