Reformat project into workspaces

api/db/migrations/20260824235922_init_ltree.sql

@@ -0,0 +1,14 @@
+-- migrate:up
+CREATE EXTENSION IF NOT EXISTS ltree;
+
+CREATE TABLE categories (
+    id SERIAL PRIMARY KEY,
+    name TEXT NOT NULL,
+    path ltree NOT NULL
+);
+
+CREATE INDEX idx_categories_path_gist ON categories USING gist (path);
+
+-- migrate:down
+DROP TABLE IF EXISTS categories;
+DROP EXTENSION IF EXISTS ltree;