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web: property suite 4/4 on the external corpus (definitional absolutes join the relations); de-flaked test_b2b

web: gate-the-gate boundary discrimination in the B2B init gate

web: logic-pass fixes (portable test_b2b, symmetric repair patience)

web: B2B MLP chain (CUTLASS ex. 13 two-GEMM fusion + ex. 23 epilogue reduction), test_b2b.js, ten-suite npm test