[Partner Nodes] feat: improve video references uploading for SeeDance 2

[bigcat88]

Let's try to route the reference-video uploads in ByteDance2ReferenceNode through the virtual library, mirroring the image algorithm we already use.

API Node PR Checklist

Scope

• Is API Node Change

Pricing & Billing

• Need pricing update
• No pricing update

If Need pricing update:

• Metronome rate cards updated
• Auto‑billing tests updated and passing

QA

• QA done
• QA not required

Comms

• Informed Kosinkadink

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds a new helper function _seedance_virtual_library_upload_video_asset to handle video uploads into Seedance's virtual library. The helper serializes input videos to MP4 format, computes a SHA-256 hash of the serialized bytes, uploads to ComfyAPI, registers a virtual-library asset with the computed hash, polls until the asset becomes active, and returns an asset:// URI. The imports are updated to include BytesIO and Types. In ByteDance2ReferenceNode, reference video uploads now use this new helper instead of direct ComfyAPI calls, so generated task content comes from virtual-library assets.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: improving video reference uploads for ByteDance 2 through virtual library routing, which directly corresponds to the changeset.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description check	✅ Passed	The PR description clearly describes routing reference-video uploads through the virtual library to mirror existing image upload patterns.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@comfy_api_nodes/nodes_bytedance.py`:
- Around line 318-321: The code computes video_hash by calling
hashlib.sha256(buf.getvalue()), which copies the whole encoded video into
memory; change this to hash the buffer without copying by using buf.getbuffer()
(e.g., pass buf.getbuffer() into hashlib.sha256) after the video.save_to call so
video_hash is computed efficiently; update the line that assigns video_hash in
comfy_api_nodes/nodes_bytedance.py to use buf.getbuffer() and keep the
subsequent call to upload_video_to_comfyapi unchanged.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

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Run ID: 15e05c7d-5d8e-4be8-ba20-bd8a8b802d91

📥 Commits

Reviewing files that changed from the base of the PR and between 0077d78 and e3b8436.

⛔ Files ignored due to path filters (1)

• comfy_api_nodes/apis/bytedance.py is excluded by !comfy_api_nodes/apis/**

📒 Files selected for processing (1)

• comfy_api_nodes/nodes_bytedance.py