ZapDB has native streaming Backup(w, since) + Load(r). The standalone
luxfi/zapdb-replicate repo was duplicate scaffolding. Sidecar daemon
+ restore init-container now live here under cmd/replicate/.
Pre-fold lineage: standalone repo at luxfi/zapdb-replicate; final
commit there c13a738 (deps Go 1.26.4 bump). No history was merged;
small repo, clean copy.
