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migrations/20251217185057_create_users_table.sql

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+CREATE TABLE users (id INTEGER PRIMARY KEY AUTOINCREMENT, username TEXT NOT NULL UNIQUE, password_hash TEXT NOT NULL);
+CREATE TABLE messages (id INTEGER PRIMARY KEY AUTOINCREMENT, user_id INTEGER NOT NULL, content TEXT NOT NULL, created_at DATETIME DEFAULT CURRENT_TIMESTAMP, FOREIGN KEY (user_id) REFERENCES users(id));