phsl / new-api

* feat(ali): support wan3.0 all-in-one video models

Extend the Alibaba task plugin for wan3.0-video / wan3.0-video-prime
using DashScope media, resolution/ratio, duration rules, and billing ratios.

* fix(ali): make wan3.0 smart duration billable and alias-safe

Review fixes on top of #7240 (qiuliw):

- duration -1 never reached the plugin: the host rejects negative
  canonical duration/seconds facts before any hook runs, on every
  entry point. Decoders now normalize -1 into an auto_duration marker;
  convert emits -1 upstream and bills 30s up front; non-wan3.0 models
  reject the marker instead of silently defaulting to 5s.
- extractUsageOnComplete read output.duration/output.resolution, but
  wan3.0 reports usage.output_video_duration and numeric usage.SR, so
  smart-duration and resolution settlement never reconciled. Read the
  usage block first, keep the legacy output fields as fallback.
- convert keyed default resolution on the client model name, so a
  channel-mapped alias fell to 720P while the direct request got 1080P.
  Every model-shaped decision in convert now uses ctx.upstreamModel.
- Unknown wan3.0 size values were silently coerced to 1080P; reject them.
- Image-only openai_responses input was accepted for every model,
  regressing t2v models into pre-consume then upstream rejection.
  Restore the guard and allow image-only for i2v and wan3.0 only.
- Native passthrough dropped wan3.0 parameters (ratio, audio) unless
  media was present; forward them via metadata for wan3.0.
- Hoist the triplicated size-to-resolution map; add wan3.0 contract tests.

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Co-authored-by: qiuliw <a1807191473@qgmail.com>