Refactor backend database connection, migration, seed

backend/migrations/20251017064937_00001_create_users_table.sql

@@ -0,0 +1,14 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS users (
+    id       INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL UNIQUE,
+    password TEXT NOT NULL,
+    role     INTEGER NOT NULL DEFAULT 2
+)
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS users;
+-- +goose StatementEnd

backend/migrations/20251017065315_00002_create_settings_table.sql

@@ -0,0 +1,14 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS settings (
+    key   TEXT PRIMARY KEY,
+    value TEXT NOT NULL
+);
+INSERT INTO settings (key, value) VALUES ('finalize_time', '10:30');
+INSERT INTO settings (key, value) VALUES ('seeded', 'false');
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS settings;
+-- +goose StatementEnd

backend/migrations/20251017065447_00003_create_menu_items_table.sql

@@ -0,0 +1,13 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS menu_items (
+    id       INTEGER PRIMARY KEY AUTOINCREMENT,
+    category TEXT NOT NULL,
+    name     TEXT NOT NULL
+)
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS menu_items;
+-- +goose StatementEnd

backend/migrations/20251017065539_00004_create_selections_table.sql

@@ -0,0 +1,17 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS selections (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id    INTEGER NOT NULL,
+    main       TEXT NOT NULL,
+    side       TEXT NOT NULL,
+    soup       TEXT,
+    created_at TEXT NOT NULL,
+    FOREIGN KEY (user_id) REFERENCES users(id)
+)
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS selections;
+-- +goose StatementEnd

backend/migrations/20251017065648_00005_create_orders_table.sql

@@ -0,0 +1,17 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS orders (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    username   TEXT NOT NULL,
+    soup       TEXT,
+    main       TEXT NOT NULL,
+    side       TEXT NOT NULL,
+    status     TEXT NOT NULL DEFAULT 'active',
+    created_at TEXT NOT NULL
+)
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS orders;
+-- +goose StatementEnd