Devices carry a reachable_prefixes set (migration 0004) reported by their agent
from the kernel FIB, via a new agent-authed POST /devices/{name}/routes endpoint.
This is scoping/observability data, so it does not bump the config generation and
is exposed on the device resource.
It deliberately does NOT limit which rules a device enforces: the compiler still
emits every applicable rule on every enforcing device. The interface-agnostic,
address-matched rule form is correct under ECMP precisely because it does not
depend on which device is on the path, and most routers hold a default route
anyway — so reachability could not meaningfully narrow the rule set. The reported
FIB is kept for fleet visibility and future zone-origin validation.
Add the store package (pgx-backed repository) with CRUD for the core resources
the compiler needs: fabrics, zones, address groups, portgroups, devices,
bindings, rules, policies. Every mutation bumps a global config generation.
Wire real JSON CRUD handlers with token auth, source/dest grammar validation on
rule create, and the agent status-report endpoint. Migration 0001 verified
against Postgres 17.
benvin