CDN-331: The Strong Lens — GCFT confronts galaxy-scale strong lensing via SLACS

We confront General Coherence Field Theory's interpolating function ν(x) = 1 + n_BE(√x) against 20 grade-A galaxy-scale strong gravitational lenses from the SLACS survey (Bolton+08, Auger+09/10). Each system provides a model-independent enclosed mass at the Einstein radius. At g/a₀ ~ 6, ν(x) ~ 1.09 — structurally irrelevant. Result: systematic FAIL (median M_GCFT/M_Ein = 0.415, all 20 under-predicted). Scale ladder diagnostic: R_DM = 0.94 (Chabrier IMF) / 0.81 (Salpeter IMF) — the highest dark matter fraction of any tested GCFT regime. D13 opened: derive the ν(x)-to-κ-proxy transition. CDN-332 pre-registered: apply cluster κ-proxy to SLACS ETGs. Archive contains Art Edition PDF, computation script, build script, and full per-lens results JSON.