feat: add backend_v1 migration

backend_v1/database/migrations/20250321112535_create_medias.sql

@@ -0,0 +1,19 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE medias(
+    id SERIAL8 PRIMARY KEY,
+    created_at timestamp NOT NULL DEFAULT now(),
+    name varchar(255) NOT NULL DEFAULT '',
+    mime_type varchar(128) NOT NULL DEFAULT '',
+    size int8 NOT NULL DEFAULT 0,
+    path varchar(255) NOT NULL DEFAULT '',
+    metas jsonb NOT NULL DEFAULT '{}' ::jsonb,
+    hash varchar(64) NOT NULL DEFAULT ''
+);
+
+-- +goose StatementEnd
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE medias;
+
+-- +goose StatementEnd