[Frankie-Xu]

Summary

• Clarify the comment in packages/shared-python/shared/services/ai/token_costing.py: DeepSeek peak windows (01:00-04:00 and 06:00-10:00 UTC) apply Monday through Friday, excluding Chinese public holidays. Weekends and Chinese public holidays are off-peak all day.
• Wording checked against the current official DeepSeek pricing footnote, including its holiday exception.
• Merged current main (f9d61119) normally to preserve existing PR history. The resulting PR changes comments only; no pricing rates, model aliases, APIs, defaults, or runtime behavior are changed.

Closes #316.

Verification

• Dependency-free comparison confirms the updated Python executable AST is identical to current main.
• Original weekday correction applies cleanly to current main; the final difference is only the peak-window comment.
• git diff --check passed.
• Focused Ruff check on token_costing.py passed.
• ruff check apps packages passed on the synchronized current-main tree through the shared two-slot validation queue.
• Independent source/spec review completed before push.
• Required GitHub Actions results are reported separately; pending fork workflow approval is not a passing CI result.

Deployment Notes

• No new or changed environment variables.
• No database migrations, queue changes, storage changes, or release-order requirements.
• Comment-only change; rollback is reverting this PR's comment commits.

Checklist

• Tests were added or updated when behavior changed — N/A (comments only; executable AST unchanged)
• Public docs, examples, or OpenAPI contracts were updated when needed — source comment updated
• Database migrations are idempotent and safe to deploy — N/A
• Logs, errors, and validation paths avoid leaking secrets or user data — unchanged
• The pull request description explains any breaking or user-visible change — none

[Frankie-Xu]

This is a first-time fork PR, so GitHub Actions is sitting at action_required. Local make lint / make typecheck / shared tests passed; happy to rebase if needed once workflows are approved.

[Frankie-Xu]

Rebased onto current main (9489fa2c, includes #414/#415). Comment-only change is unchanged; still waiting on first-time fork Actions workflow approval.

[EricNGOntos]

Thanks for catching the wording. We're not taking comment-only docs tweaks right now — we'll fold this into the next pass on the DeepSeek pricing notes if needed.