CREATE TABLE media (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    filename TEXT NOT NULL,
    storage_key TEXT NOT NULL,
    url TEXT NOT NULL,
    mime_type TEXT NOT NULL,
    size_bytes BIGINT NOT NULL,
    alt_text TEXT NOT NULL DEFAULT '',
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);