feat: added device models

migrations/2025-02-23-165014_devices/down.sql

@@ -0,0 +1 @@
+drop table devices;

migrations/2025-02-23-165014_devices/up.sql

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+create table devices (
+    id integer primary key not null,
+
+    device_id text not null,
+    user_id bigint not null
+        references users (id)
+        on delete cascade,
+
+    caption text not null,
+    type text not null,
+
+    unique (user_id, device_id)
+);