LBM sgonly — Singapore-only line (zero client transaction data)

Stage-2 SFT of amityco/lbm-stage1-base on amityco/lbm-sft-sgonly (151,985 rows: the v3.4-r2 mix with every client-transaction row removed). Answers: what do the SG persona layers achieve WITHOUT TH transaction data? Evals: Lazada 12,480 + Lotus §7 coupon (results in repo docs). Reconstruct merged = base + this adapter if merged shards are absent.