fix: move essentials_category to correct replacement nodes

[christian-byrne]

Summary

Move essentials_category assignments from deprecated/incorrect nodes to their proper replacements.

Changes

• ImageBatch → BatchImagesNode: ImageBatch is deprecated; move essentials_category to its replacement BatchImagesNode
• Blur (ImageBlur) → removed: Blur should use the subgraph blueprint GLSL shader instead of the native node
• GetVideoComponents → Video Slice: Video Slice is the correct node for the Video Tools essentials category

Related frontend PR: Comfy-Org/ComfyUI_frontend#9072

[coderabbitai]

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📝 Walkthrough

Walkthrough

The pull request reorganizes essentials_category metadata assignments across node definitions in three files. In comfy_extras/nodes_post_processing.py, the category is removed from ImageBlur and added to BatchImagesNode. In comfy_extras/nodes_video.py, the category is removed from GetVideoComponents and added to VideoSlice. Additionally, the ESSENTIALS_CATEGORY constant is removed from the ImageBatch class in nodes.py. These changes result in a net modification of +2 lines and -3 lines across the affected files.

🚥 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
Title check	✅ Passed	The title 'fix: move essentials_category to correct replacement nodes' accurately summarizes the main change: reassigning essentials_category metadata from deprecated/incorrect nodes to their proper replacements.
Description check	✅ Passed	The description clearly explains the changes: moving essentials_category from ImageBatch to BatchImagesNode, removing it from ImageBlur, and moving it from GetVideoComponents to VideoSlice, with context about deprecations.

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