feat: init

internal/repository/migrations/0001_init.up.sql

@@ -0,0 +1,29 @@
+create table users (
+    id              uuid        primary key,
+    login           text        not null
+);
+
+create type status as enum ('active', 'offline', 'busy');
+
+create table stations (
+    id              uuid        primary key,
+    slug            text        not null,
+    status          status      not null
+);
+
+create table satellites (
+    id              uuid        primary key,
+    display_name    text        not null,
+    status          status      not null
+);
+
+create table subscriptions (
+    id              uuid        primary key,
+    user_id         uuid        not null references users(id),
+    station_id      uuid        null references satellites(id),
+    satellite_id    uuid        null references stations(id),
+    created_at      timestamp   not null,
+    updated_at      timestamp   not null,
+
+    check (station_id is not null or satellite_id is not null)
+);