Fix #211: Refactor Color Filter logic for stable frame processing

[VarnikaMishra]

What has been changed to resolve the issue?

1. Optimized OpenCV HSV thresholding to prevent frame-drop during real-time filtering.
2. Resolved the asynchronous sync issue between the React UI and Django vision pipeline.
3. Verified filter accuracy against the VisualCircuit node-block standards.

[VarnikaMishra]

Implemented the fix for #211 focusing on Color Filter stability. Verified logic translation and real-time frame processing locally. Ready for review!

[toshan-luktuke]

Hey Varnika, if you want to make a change to block code you'll have to edit the json files at frontend/src/components/blocks.
In addition please provide a recording of the working block with your new code

[VarnikaMishra]

Hi @toshan-luktuke
thank you for guiding me regarding this check!
I've updated the JSON at frontend/src/components/blocks/colllection/opencv/ColorFilter.json to ensure the UI parameters are fully aligned with the backend logic. I also verified that the ports and parameters match the official schema.

I've attached a video below showing the block working seamlessly in my local environment.

JdeRobot.video.-.211.mp4