P54: Thermodynamic Consistency of CCEGA Black Stars

Complete thermodynamic analysis of CCEGA black star formation from a 7 M_sun progenitor. Three results: (1) Second law satisfied — S_final ~ 10^76 >> S_initial ~ 10^58, dominant channel is GW emission. (2) Corrected RT entropy S_RT ~ 10^53, factor 10^25 below Bekenstein-Hawking — UV surface estimate of P53 corrected. (3) Radion braking releases ~0.63 E_bind, producing 2-12x neutrino pulse enhancement over GR collapse, detectable by Hyper-K/DUNE. Multi-messenger signature: neutrino enhancement + 42 microsecond bounce feature + 14 ms GW echo + 3.8 kHz QNM.