[Partner Nodes] feat: enable Bria Replace Background node

[bigcat88]

Additionally, this PR adjusts the price badges to be in sync with recent Bria price reduction

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]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: ce853cb8-fb44-4379-bdab-a7977f3acb29

📥 Commits

Reviewing files that changed from the base of the PR and between d8dd2ba and 1fc0c87.

📒 Files selected for processing (1)

• comfy_api_nodes/nodes_bria.py

🚧 Files skipped from review as they are similar to previous changes (1)

• comfy_api_nodes/nodes_bria.py

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📝 Walkthrough

Walkthrough

This PR updates the Bria video integration by fixing a background image compatibility issue, registering a previously excluded node, and adjusting pricing metadata. The BriaVideoReplaceBackground.execute method now converts background images from RGBA to RGB format before uploading to resolve API failures with alpha channels. The node itself is uncommented and added to the extension's returned node list, enabling runtime availability. USD per-second pricing rates are also recalibrated across four video processing nodes.

🚥 Pre-merge checks | ✅ 4 | ❌ 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 (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: enabling the Bria Replace Background node, which matches the primary objective and the code change that uncomments the node from the registry.
Description check	✅ Passed	The description is related to the changeset, mentioning the price badge adjustments and referencing the Bria price reduction, which aligns with the code changes and includes a relevant checklist.
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.

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