Add full released MNIST categorical-ANOVA reproduction

Independently rerun the Mushrooms benchmark (previously not executed): hypergrid 9.75e13, R^2=1 at machine precision in 0.010s, validated on a held-out half

Map exact current anchored claims to existing independent evidence

Map exact current anchored claims to existing independent evidence

Upgrade to exact categorical ANOVA ICML reproduction

Update logbook: Repro - AgentSelect: Benchmark for Narrative Query-to-Agent Recommendation

Update logbook: Repro - AgentSelect: Benchmark for Narrative Query-to-Agent Recommendation

Update logbook: Repro - AgentSelect: Benchmark for Narrative Query-to-Agent Recommendation

initial commit