CREATE TABLE IF NOT EXISTS audit_logs (
    id BIGSERIAL PRIMARY KEY,
    tenant_id UUID NOT NULL,
    user_id BIGINT NOT NULL,
    action VARCHAR(64) NOT NULL,
    resource VARCHAR(128) NOT NULL,
    resource_id VARCHAR(128),
    detail TEXT,
    ip VARCHAR(64),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_audit_logs_tenant_id ON audit_logs(tenant_id);
CREATE INDEX IF NOT EXISTS idx_audit_logs_user_id ON audit_logs(user_id);
CREATE INDEX IF NOT EXISTS idx_audit_logs_action ON audit_logs(action);
CREATE INDEX IF NOT EXISTS idx_audit_logs_resource ON audit_logs(resource);
CREATE INDEX IF NOT EXISTS idx_audit_logs_created_at ON audit_logs(created_at);