8. Deployment Profiles

Profile	Hardware floor	Stack
Solo practice	1× mini-PC + workstations	Full Postgres each machine; practice node = parent
Rural clinic (off-grid)	Raspberry Pi 5 class, solar	Postgres on Pi; sneakernet/3G sync to district
Hospital department	1 small server	Postgres + sync service, scoped mirror
Hospital core	HA Postgres pair	Patroni-style failover; parent for departments
Regional/national	Cluster	Aggregation, registries, cross-facility matching, master patient index

Packaging: single container image / Debian package per node; configuration declares tier, parent, sync scope. Zero-DBA target for lower tiers. Where in-database Rust (pgrx, §9.4 / ADR-0002) is used, the node image ships the native extension built for its architecture (ARM64 for Pi, x86_64 for servers) and PostgreSQL major version — a per-arch build step in the pipeline, transparent at deploy time.