docs: small fixes for self-host, workspace, and CJK disclaimers

[RiskeyL]

Summary

• docker-compose section headings: Removed the redundant "Dify" suffix from the four H2 headings in the Docker Compose deployment guide (Deploy and Start, Access, Customize, Upgrade), since the section already lives under that page. Mirrored across en, zh, and ja.
• Team plan limit and Dataset Operator role: Updated the Team plan from "Unlimited" to 50 members to match current pricing. Removed the retired Dataset Operator role from use-dify/workspace/team-members-management.mdx and the workspace overview bullet list. Mirrored across en, zh, and ja.
• Japanese translation fixes in workspace docs: In ja/use-dify/workspace/team-members-management.mdx, every occurrence of "workspace" had been mistranslated as ワークフロー (workflow); restored to ワークスペース and stripped the spurious bold the MT pass left around モデルプロバイダー and 知識ベース. Retranslated the broken email-service Info note (Communityようにメールサービス設定が必要です。). In ja/use-dify/workspace/readme.mdx, the Editor bullet had been merged into the Admin bullet during the original AI translation pass; split back into two bullets.
• AI translation disclaimer spacing: Added the missing CJK-Latin spaces required by tools/translate/formatting-{zh,ja}.md so every translation disclaimer matches the canonical template. zh: 请参考[英文原版] → 请参考 [英文原版] across 69 files. ja: このドキュメントはAIによって自動翻訳 → このドキュメントは AI によって自動翻訳 across 80 files.
• Disclaimer link spacing rule alignment: The Links rule in tools/translate/formatting-ja.md requires a space between a Markdown link and an adjacent Japanese particle, but the canonical disclaimer template in that same guide was missing the space before を参照してください. Fixed the template and updated 137 ja disclaimer pages so all 141 ja disclaimers comply.