The HerdR flicker fix routed direct HerdR panes onto the in-place
multiplexer resize path, but the randomized render-stress oracle still
modeled them as ED3 replaying direct terminals. The width-epoch ledger
now applies to any in-place-resize scenario (multiplexer + direct HerdR)
via a dedicated resizeRepaintsInPlace trait, keeping HerdR's direct
scrollback semantics intact. Adds a deterministic replay regression
(seed 0xcafed00d, 24 iterations) that fails without the oracle update.