feat: Add database initialization script and default admin user seeding.

scripts/db-init.js

@@ -63,6 +63,17 @@ async function main() {
         `);
         console.log("[DB Init] Table session_snapshots is verified/created.");
 
+        await tempPool.query(`
+            CREATE TABLE IF NOT EXISTS "users" (
+                "id" serial PRIMARY KEY NOT NULL,
+                "username" varchar(50) NOT NULL UNIQUE,
+                "password_hash" text NOT NULL,
+                "role" varchar(20) NOT NULL DEFAULT 'user',
+                "created_at" timestamp DEFAULT now()
+            );
+        `);
+        console.log("[DB Init] Table users is verified/created.");
+
         await tempPool.end();
         console.log("[DB Init] Initialization successful. Exiting.");
         process.exit(0);

src/features/auth/logic/seed-admin.ts

@@ -10,18 +10,7 @@ import { count, eq, sql } from "drizzle-orm";
  */
 export async function ensureAdminExists() {
     try {
-        // 1. Auto-repair: Ensure table exists
-        await db.execute(sql`
-            CREATE TABLE IF NOT EXISTS users (
-                id SERIAL PRIMARY KEY,
-                username VARCHAR(50) NOT NULL UNIQUE,
-                password_hash TEXT NOT NULL,
-                role VARCHAR(20) NOT NULL DEFAULT 'user',
-                created_at TIMESTAMP DEFAULT NOW()
-            );
-        `);
-
-        // 2. Check if admin specifically exists
+        // 1. Check if admin specifically exists
         const adminUser = await db.select()
             .from(users)
             .where(eq(users.username, "admin"))