Completed-Event Transport: A Reproducible Record-Deletion Benchmark on Trapped-Ion Data

Testing how retained measurement records determine prediction performance \[\boxed{p(y,r\mid C)=\frac12\langle y|E_r(C)|y\rangle,\qquad \mathcal R_S-\mathcal R_R=\mathbb E[(q_R-q_S)^2]\ge0.}\] How much predictive information survives when some detector records are unavailable? This paper constructs a normalized source-to-record instrument, derives its exact deletion and prediction-loss rules, and executes it on 32,000 tree records from 6,400 trapped-ion hardware shots across 800 jobs from Feng and colleagues. It introduces Quantum Traction Theory (QTT) in plain language and states every physical premise needed for the completed-event reconstruction. Seven fixed record selections, five measurement strengths and 235 calibration moments are evaluated without target-fitted noise, contrast or normalization. At the strongest setting, two early records give 72.27% measured accuracy against 72.47% conditional expectation; all thirty give 74.41% against 74.88%. The frozen simultaneous test does not reject the nominal model at 5% (approximate cluster-multiplier p=0.0862). All 30 nested comparisons show positive measured prediction gains. A complementary retrospective full-record success-calibration test gives p=0.0189, indicating modest tension with the same nominal instrument. The two tests examine different summaries; both results are retained. The source-to-record theorem is conditional on the printed transport and sampling premises. Its matched ordinary-QM instrument has exactly the same probabilities and no target-fitted coefficients. This is a retrospective operational benchmark, not a prospective preregistration or QTT-exclusive detection. Microscopic contact and detector-sampling qualification remain distinct physical tasks. The reconstruction archive contains the full analysis, source, fixed protocol, probability tables, provenance and reproducibility instructions. The PDF is the primary reading copy. Original experiment: Feng et al.; original data: experimental archive, version 3. Source-theorem dependency: QTT Completed-Event Transport and Quantum Coherence. Corpus navigation: DOI Map and Derivation Atlas.