fix: restore data archiving changelog

[Jocky-Teable]

Changes

• Restore the complete Data Archiving changelog entry for Aug 11, 2026 in English and Chinese
• Move Brand customization and stability improvements to Aug 12, 2026
• Move Enhanced performance, real-time responsiveness, and stability to Aug 13, 2026

Verification

• Based on the latest origin/main at commit 27059cb
• Confirmed EN and ZH entries are ordered Aug 14, Aug 13, Aug 12, Aug 11, Aug 10
• git diff --check passed

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