Tighten prompt_template_source.notes: explicit 5-tier classification per 2026-06-01 priority rules

Refine prompt_template_source: cite verifiable official sources per 2026-05-30 deep audit

Populate prompt_template_source for all subsets per 2026-05-30 audit

Update metadata.json

Restructure: revert to single default config with exist+relation splits (matches official OpenGVLab/CRPE 2-eval-file setup)

initial commit