v0.1.7 — README accuracy fixes

Docs

• Added md_to_pdf.py to the project tree (it was missing from What ships).
• Corrected the cheatsheet inputs description — errors/log.md is the seed for weakmap and the heart of the cheatsheet's traps section, not its only input (cheatsheet also reads patterns.md, coverage.md, and summary.md).
• Documented the harness environment variables — PAIDEIA_MODEL, PAIDEIA_TIMEOUT, PAIDEIA_ASK_PERMISSIONS, PAIDEIA_PYTHON — and the opencode.json workspace config, in both README and README.ko.