chore(hypatia): exempt formal/Rows.v from the V-lang ban (per-file matcher)

.hypatia-ignore matches `${rule}:${path}` as fixed-string whole-line equality
(grep -qxF), not a glob — so each formal/*.v needs its own two lines. The new
Rows.v scaffold is a Coq proof script like its 16 siblings; add the same
vlang_detected + banned_language_file exemptions so a sweep cannot mis-flag it
as V-lang. (Rows.v stays un-wired from _CoqProject — the exemption is about the
file in the tree, independent of the build graph.)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BbxKhXQwTvVgkYDgBMLJoa

Author: claude

.hypatia-ignore

@@ -75,3 +75,10 @@ cicd_rules/vlang_detected:formal/F5_RenderFaithful.v
 cicd_rules/banned_language_file:formal/F5_RenderFaithful.v
 cicd_rules/vlang_detected:formal/RealWasm.v
 cicd_rules/banned_language_file:formal/RealWasm.v
+# Rows.v — record-row soundness scaffold (Wave-W0). Authored without a Coq
+# toolchain, so it is UNVERIFIED and deliberately NOT in formal/_CoqProject;
+# it is still a Coq proof script in the tree and must be exempted from the
+# V-lang ban like its siblings (the ignore matcher is fixed-string per-file,
+# not a glob, so a new .v needs its own lines).
+cicd_rules/vlang_detected:formal/Rows.v
+cicd_rules/banned_language_file:formal/Rows.v