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

Refine prompt_template_source for en

Refine prompt_template_source for cn

Refine prompt_template_source for cc

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

Restructure: restore metadata.json

Restructure: push en config

Restructure: push cn config

Restructure: push cc config

initial commit