retag: logbook.json (verbatim titles)

resync: real C4 T4 pre-training (FOAM-2 PPL 219 vs Adam 685) + 1.3B memory census reproducing Table-3 ordering

fix: align claim page titles to official scaffold (2026-07-22T08:19:11Z)

fix: verbatim official claim titles (repro-foam)

Update logbook: Reproduction: FOAM — Blocked State Folding for Memory-Efficient LLM Training

FOAM: HF Jobs evidence on C1/C2/C3 + index/conclusion

Update logbook: Reproduction: FOAM — Blocked State Folding for Memory-Efficient LLM Training

Update logbook: Reproduction: FOAM — Blocked State Folding for Memory-Efficient LLM Training