docs(claude.md): mark V-lang migration COMPLETED + cite hypatia rule (#81)

## Summary

Estate-wide V→Zig migration landed 2026-05-28 across 16 PRs. Updates the
banned-languages table entry for V to reflect:
- migration COMPLETED on 2026-05-28
- detection now lives in hypatia `cicd_rules/vlang_detected` +
`vmod_detected`

Companion to standards#227.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.claude/CLAUDE.md

@@ -43,7 +43,7 @@ The following files in `.machine_readable/` contain structured project metadata:
 | Bun | Deno |
 | pnpm/yarn | Deno |
 | Go | Rust |
-| V (vlang) | Zig/Rust |
+| V (vlang) | Zig/Rust — migration COMPLETED 2026-05-28; detected via hypatia `cicd_rules/vlang_detected` + `vmod_detected` |
 | Python | Julia/Rust/AffineScript |
 | Java/Kotlin | Rust/Tauri/Dioxus |
 | Swift | Tauri/Dioxus |