Correct the Cite(d) claim (both sides are lower bounds), report gold-set sizes, add BC diagnostics and the Reachability Gain measure

UALB-23: domain-matched (administrative) UA coupling — density 0.110 (~46x CA), confound ruled out; paper 16pp

UALB-22: BM25 baseline (vectorized) + bootstrap CIs + UA-CA significance; paper updated

Add RQ4: coupling temporal decay + coupling/co-citation orthogonality (paper 15pp, +tools/data)

Add UA Cite(d) map for the coupling metrics

Add Yoshioka (Sekiguchi et al.) Extended-Precision/Coverage results + Cite(d) map + updated retrieval tool

Add cross-jurisdictional coupling tools + UA-derived data (reproducibility)