v0.34.1 — review --file crash + locale inference fix (#92)

Fixed

• review --file <relative path> crashed with ValueError (#92, regression
  from the #86 Scored: print). The new header printed md_path.relative_to(ROOT),
  which raises when --file is a relative or out-of-repo path. Now resolves first
  and guards relative_to, falling back to the absolute path.
• review --file mis-inferred en_US for a locale-tagged filename (#92). The
  filename→locale regex ([a-zA-Z_]+) greedily captured the persona/variant
  suffix too (zh_TW_agentic_ats from resume_v012_zh_TW_agentic_ats.md),
  yielding an invalid locale that fell back to en_US — so a non-English résumé
  under-scored AI-proficiency. Now captures only the xx_YY locale token. Affects
  every suffixed filename, not just --file.