Add RFDetr model for Object Detection and Instance Segmentation

[kprokofi]

Summary

• Add RFDetr model (OD)
• Add RFDetr model (IS)
• Add unit tests
• Fine-tune hyper parameters (LR, Augmentations, EMA, Scheduling, BS, Grad accumulation, multi-scale training)
• Resolve an issue with filtering predictions during test (filtering predictions before computing mAP -> destroyed the metric. Now we do filtering only in predict method and directly use threshold in F1-score metric)
• Upgrade TorchMetrics and Lightning to use EMA. Fix Dice metric for segmentation
• Provide full benchmark

How to test

Checklist

• The PR title and description are clear and descriptive
• I have manually tested the changes
• All changes are covered by automated tests
• All related issues are linked to this PR (if applicable)
• Documentation has been updated (if applicable)

[Copilot]

Pull request overview

This PR adds support for the RF-DETR (Real-time Fast DETR) object detection model from Roboflow, integrating it into the OTX framework. RF-DETR combines a DINOv2 backbone with a lightweight DETR decoder for real-time object detection.

Key changes:

• Integration of RF-DETR model with five variants (nano, small, base, medium, large)
• Unit tests for RF-DETR model and detector wrapper
• Training recipes for all model variants

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
library/src/otx/backend/native/models/detection/rfdetr.py	Core RF-DETR model implementation with training, inference, and export functionality
library/src/otx/backend/native/models/detection/detectors/rfdetr.py	Detector wrapper that interfaces between OTX and the rfdetr package
library/src/otx/backend/native/models/detection/detectors/init.py	Added RFDETRDetector export
library/src/otx/backend/native/models/detection/init.py	Added RFDETR model export
library/src/otx/recipe/detection/rfdetr_*.yaml	Training configuration files for all five RF-DETR variants
library/tests/unit/backend/native/models/detection/test_rfdetr.py	Unit tests for RFDETR model class
library/tests/unit/backend/native/models/detection/detectors/test_rfdetr_detector.py	Unit tests for RFDETRDetector wrapper

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