DOCS: Add missing docstrings to YOLO utility functions Body:

[Rudra-Tiwari-codes]

What's wrong with the existing documentation

Description

The backend/app/utils/YOLO.py file contains several utility functions for object detection that lack proper documentation. Adding docstrings will improve code readability, maintainability, and help new contributors understand the codebase.

Functions Missing Docstrings

Function	Purpose
YOLO_util_nms	Non-Maximum Suppression
YOLO_util_multiclass_nms	Per-class NMS
YOLO_util_compute_iou	IoU calculation
YOLO_util_xywh2xyxy	Bounding box format conversion
YOLO_util_draw_detections	Detection visualization
YOLO_util_draw_box	Bounding box drawing
YOLO_util_draw_text	Text label drawing
YOLO_util_draw_masks	Overlay mask drawing

Proposed Solution

Add Google-style docstrings with:

• Function description
• Args documentation with types
• Returns documentation

Benefits

• Improves code documentation and readability
• Helps new contributors understand the YOLO utilities
• Follows Python best practices for documentation
• Aids IDE autocompletion and type checking

Labels

• documentation
• backend
• good-first-issue

Add ScreenShots

No response

Record

• I agree to follow this project's Code of Conduct
• I want to work on this issue

[V4Vikaskumar]

Hi maintainers 👋

I’m interested in this issue and I’ve started working on it.
I’ll be adding proper Google-style docstrings to the mentioned YOLO utility functions to improve clarity and documentation quality.

I’ll raise a PR once the changes are ready. Please let me know if there’s anything specific you’d like me to follow.

Thanks!