Wiki headers: fix star type mismatches on GJ 53A (K→G), GJ 136 (M→G), GJ 625 (K→M), GJ 682 (K→M), GJ 3728B (G→K), GJ 1128 (K→M). Tooling: fix shell injection in atlas-commit-and-sync (use sys.argv). Proposals: GJ625 M2→M2V, GJ432A heritage descriptor, GJ667C triple-star note, GJ53A G5Vp peculiar note. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>