docs(release): record DeepSeek v4 live smoke

[Hmbown]

Summary

• record a dated DeepSeek V4 Flash direct-provider live smoke
• include the exact sentinel prompt/result
• note redacted auth source without printing any secret value

Verification

• codewhale auth status --provider deepseek (redacted status only)
• ./target/release/codewhale --provider deepseek --model deepseek-v4-flash exec "Reply exactly CODEWHALE_V09_SMOKE_OK and nothing else."
• git diff --check
• cmp -s CHANGELOG.md crates/tui/CHANGELOG.md
• ./scripts/release/check-versions.sh
• ./scripts/release/check-ohos-deps.sh

[greptile-apps]

Hmbown has reached the 50-review limit for trial accounts. To continue receiving code reviews, upgrade your plan.

[gemini-code-assist]

Code Review

This pull request updates the release acceptance documentation in docs/V0_9_0_RELEASE_ACCEPTANCE.md to mark the DeepSeek V4 direct provider smoke gate as completed (ship), adding the local test execution details as evidence. There are no review comments, and I have no feedback to provide.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.