Replace mode was tried live on a turn that actually completes a tech, with a
two-process hooks=off oracle established first on that exact (save, procedure,
route). Verdict: game/sim/research stays compared.
What displaced: all 13 tech-tree leaves the turn moves -- 2 from the pass itself
and 11 from the SetResearched cascade -- produced by our code in live game memory,
with the original's ProcessResearch never executing.
What did not: 16 leaves, every one written by ServerPlayer::OnTechResearched.
Five player tech-effect fields (OutMod, ConMod[0..2], ResTNm), one ObservedTech
element, two event records plus EvNxID, and five derived leaves behind them.
Also: ref-turn2 + one End Turn does NOT complete a tech, so every research oracle
before this one was taken on a quiet turn; and a config that names all 27 registered
hooks off and passes check_shim_configs.py still installs six detours, because the
M0 stub and the FPU module's four sampling detours have no hook. key.
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