TQNT-V5.4 — Heavy protons Gen 5+ predictions: 40 candidates with LHC accessibility

TQNT-V5.4 paper presenting 40 Gen 5+ heavy proton predictions from the V5 catalog (n=3, J=1/2, Q_phys≈+1, c∈[18,30]), of which 3 are LHC-accessible in the [2.9, 3.3] GeV window. Includes signatures for atomic nuclei, heavy water, mass spectroscopy (m/z=20.131), and IR (ν3(O-H̄)=2280 cm⁻¹). Compatible with current LZ/XENONnT/PandaX null results via Vassiliev suppression σ_DM-N(c) = σ_EM·α_EM^(c-18). Complements the V5 monograph (10.5281/zenodo.19131538).