feat: vidu use credits as total_tokens

[feitianbubu]

vidu视频使用返回的积分做为token计费

Summary by CodeRabbit

Release Notes

Bug Fixes

• Fixed billing system accuracy by correcting model name identification in charge calculations, ensuring costs are properly attributed to the appropriate video generation model
• Enhanced token usage reporting for task completions by ensuring completion and total token counts are properly calculated from applied credits, providing accurate consumption metrics

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[coderabbitai]

Walkthrough

Refactored model name sourcing for billing calculations in video tasks from task.Data unmarshaling to task.Properties.OriginModelName. Enhanced Vidu task result parsing to populate CompletionTokens and TotalTokens from credits upon successful task completion.

Changes

Cohort / File(s)	Summary
Video Task Billing controller/task_video.go	Changed model name retrieval from unmarshaled task.Data to task.Properties.OriginModelName when calculating billing for successful total tokens scenario
Vidu Task Result Parsing relay/channel/task/vidu/adaptor.go	Added conditional population of CompletionTokens and TotalTokens from credits value when task state is "success"

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• feat: video priority use origin model name #1381: Both PRs change how model name is sourced to prefer OriginModelName for video task processing and model selection.
• feat: add ali wan video #2141: Aligns with the addition and population of Properties field that this PR now depends on for retrieving OriginModelName.

Poem

🐰 Hopping through properties, no more marshaling haste,
The model name finds its rightful place,
Tokens now flow from credits with grace,
Video tasks billing at a swifter pace! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat: vidu use credits as total_tokens' accurately describes the main change: modifying vidu video billing to use credits as the total_tokens metric.

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✨ Finishing touches

• 📝 Generate docstrings

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