Fix schema

postgres/schema/0005_accounts.sql

@@ -0,0 +1,10 @@
+-- +goose Up
+CREATE TABLE accounts (
+        id uuid DEFAULT uuid_generate_v4() PRIMARY KEY,
+        budget_id uuid NOT NULL REFERENCES budgets (id) ON DELETE CASCADE,
+        name varchar(50) NOT NULL,
+        on_budget boolean DEFAULT TRUE NOT NULL
+);
+
+-- +goose Down
+DROP TABLE accounts;