A thin nonconducting ring of radius \(R\) is fixed in the \(yz\)-plane, centered at the origin, and carries a uniform positive charge \(Q\). A particle of mass \(m\) and charge \(-q\) is constrained to move along the \(x\)-axis. The particle is released from rest at \(x = x_0\), where \(x_0 \ll R\). What is the maximum speed \(v_{\text{max}}\) of the particle as it oscillates through the center of the ring?