costsweep_v2 round 2: held-out GLM sweeps + the gemma rows

batteries/: raw eval responses for the midtrain/SDF/graft three-way

data/: the two elicitation studies' training mixes and frozen battery

clean repo: gemma4_26b_a4b_190m|charter (1/5)

glm45_air_1b/charter: training metadata + built mixes

training metadata (loss curves, logs, provenance, configs) + built training mixes (part 2)

training metadata (loss curves, logs, provenance, configs) + built training mixes