CREATE TABLE IF NOT EXISTS contact_labels (
  contact_id INTEGER NOT NULL,
  tag_id INTEGER NOT NULL,
  account_id INTEGER NOT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (contact_id, tag_id)
);

CREATE INDEX IF NOT EXISTS idx_contact_labels_contact_id ON contact_labels(contact_id);
CREATE INDEX IF NOT EXISTS idx_contact_labels_tag_id ON contact_labels(tag_id);
CREATE INDEX IF NOT EXISTS idx_contact_labels_account_id ON contact_labels(account_id);