Proof-of-path for the test-arch reframe: pure-behavior rows become
in-language @test row-tables run by `ww test`, reserving C drivers for
the two irreducible jobs (byte-id + bootstrap). 110_uniesc's 6 value
rows become [N]struct row-tables in a new test/lang/ tree; the trailing
.wwi round-trip stays in C as external-observer residue. Additive — the
C rows are kept; de-dup and make-rewiring land at fold 6 (task #12).
Green on both stages.
Hojun-Cho
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