-- A1 — routes table (P3-owned). Not present in 0001_init.sql: the RouteStore port is a
-- Redis-like live routing table (INV7 — NOT source of truth). This Postgres adapter needs a
-- durable backing for it. Postgres has no per-key TTL, so we store an explicit `expires_at`
-- and treat `expires_at <= now()` as ABSENT (fail-closed, INV7); expired rows are lazily
-- DELETEd on access. This mirrors `store/memory.ts` memRouteStore() semantics exactly.
--
-- No FK to hosts(host_id): routes are an ephemeral location cache keyed by host_id, decoupled
-- from the ownership source of truth (matches memory.ts, where routes live independently).
CREATE TABLE IF NOT EXISTS routes (
  host_id       uuid PRIMARY KEY,
  relay_node_id text NOT NULL,
  updated_at    timestamptz NOT NULL,
  expires_at    timestamptz NOT NULL
);
CREATE INDEX IF NOT EXISTS routes_node_idx ON routes(relay_node_id);