CREATE TABLE IF NOT EXISTS tutor_profiles (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    
    -- Tutor Specific Fields
    subjects_taught TEXT[], -- e.g., ["math", "physics", "computer science"]
    education_level VARCHAR(255),
    certifications TEXT,
    years_of_experience INT,
    hourly_rate INTEGER,   -- in paise (INR × 100)
    
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    -- Ensure a user can only have one tutor profile
    UNIQUE(user_id)
);