A pre-existing stale assertion, surfaced by wiring volume-manager into the root
test aggregate (its partition fixtures now run under `zig build test`).
entries_per_reply is computed as (packet_maximum 256 - prefix 16) / sizeof
ChildEntry 32 = 7; the test asserted 10, the value the old count-header layout
carried. No behavior change — the enumerate producer and consumers already page
by the real capacity; only the test documented an obsolete number.
Daniel Samson
5637d0e5fc