Replaces the strict >1,000,000/<20,000,000 range with an inclusive >=10,000/<=20,000,000 range, matching the actual usable range confirmed on the real Sổ Bán Lẻ catalog after the earlier per-line-qty fix. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017KPzWwuTEeX2vXGXvyGn4q
