082ee31966
Stress-tests the iterated preprocessing algorithm on random maximal-outerplanar triangulations: terminates on n<=60 within bounded steps, occasionally hits step cap at n=80 with random edge choice. Scaffolds the user-proposed v_c-rotation algorithm and documents the monovariant findings (lexicographic depth signature is weakly but not strictly decreasing under preprocessing). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>