fix(i18n/ko): review fixes for 6 Korean translation files

[lin-bot23]

Summary

Fixes quality issues in 6 Korean translation files for ComfyUI Docs, following the terminology glossary and review requirements.

Files Fixed

1. ko/registry/api-reference/token-management/retrieve-all-personal-access-tokens-for-a-publisher.mdx - Removed extra frontmatter (translationSourceHash, translationFrom), added reviewSourceHash
2. ko/development/cloud/api-reference.mdx - Removed extra frontmatter, added missing heading, fixed "휠체어로 확인" (wheelchair) → "작업 완료 폴링" (poll for job completion)
3. ko/specs/workflow_json_0.4.mdx - Fixed frontmatter, reverted translated JSON key "S&R용 노드 이름" → "Node name for S&R", fixed JSON syntax error in links array
4. ko/registry/api-reference/nodes/delete-a-specific-node.mdx - Removed extra frontmatter, added reviewSourceHash
5. ko/development/core-concepts/links.mdx - Fixed frontmatter, fixed terminology: Reroute→경유점 노드, Conditioning→조건화, finished→완료
6. ko/tutorials/llm/gemma4/gemma4.mdx - Fixed frontmatter, fixed terminology: 워크플로우→워크플로, 오디오 변환→오디오 전사, 맞춤화→사용자 정의, 객체 탐지→객체 감지, 둘러보기→찾아보기

Changes Made

• Removed non-English metadata fields (translationSourceHash, translationFrom) from all files
• Added reviewSourceHash with SHA-256 first 8 chars of English source
• Fixed Korean terminology per standard glossary
• Fixed JSON syntax error (malformed links array)
• Reverted translated JSON code key