[WIP] Implement job to export dataset

[itallix]

Summary

• Added new job for dataset export
• Refactored job implementations as executors
• Added behave with bdd tests for job export
• Added GHA step to run bdd tests

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 refactors job implementations into an executor pattern and adds dataset export functionality with comprehensive BDD testing.

Changes:

• Refactored job implementations from a Trainer base class to a more generic Executor base class
• Added dataset export job with support for COCO, YOLO, and DATUMARO_V2 formats
• Implemented BDD tests using behave framework for dataset export scenarios

Reviewed changes

Copilot reviewed 50 out of 57 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
application/backend/app/executors/base.py	Renamed Trainer to Executor and removed training-specific logic
application/backend/app/executors/dataset_export/exporter.py	New dataset exporter implementation with multi-format support
application/backend/app/models/jobs/export_dataset_job.py	New job model for dataset export operations
application/backend/app/api/routers/jobs.py	Added endpoint handling for dataset export job submission
application/backend/app/lifecycle.py	Registered dataset exporter in job controller factory
application/backend/tests/bdd/	BDD test infrastructure and dataset export scenarios
application/backend/app/repositories/filters.py	Extracted common filter logic for reuse
application/backend/app/models/dataset_item.py	Added REVIEWED_WITH_UNANNOTATED annotation status
.github/workflows/backend-lint-and-test.yaml	Added BDD test execution step

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[github-actions]

📊 Test coverage report

Metric	Coverage
Lines	34.7%
Functions	74.1%
Branches	88.3%
Statements	34.7%

[github-actions]

Docker Image Sizes

CPU

Image	Size
geti-tune-cpu:pr-5443	2.97G
geti-tune-cpu:sha-1752408	2.97G

GPU

Image	Size
geti-tune-gpu:pr-5443	10.95G
geti-tune-gpu:sha-1752408	10.95G

XPU

Image	Size
geti-tune-xpu:pr-5443	9.76G
geti-tune-xpu:sha-1752408	9.76G

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.

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