CREATE TABLE IF NOT EXISTS rules (
  id SERIAL PRIMARY KEY,
  owner_id INTEGER NOT NULL REFERENCES participants(id),
  name TEXT NOT NULL,
  conditions JSONB NOT NULL DEFAULT '[]',
  actions JSONB NOT NULL DEFAULT '{}',
  enabled BOOLEAN NOT NULL DEFAULT true,
  priority INTEGER NOT NULL DEFAULT 0,
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
);
CREATE INDEX IF NOT EXISTS idx_rules_owner ON rules(owner_id);