Introduce datumaro integration tests for Geti Sample types

[itallix]

Summary

The goal of this PR is to be more proactive when detecting regressions related to datumaro integration.
New test suite will be executed on pre-collected datasets that cover all supported formats and App Sample types.

The failures will indicate either the issues in experimental datumaro logic (import_dataset + convert_schema) or the outdated App sample type definitions.

No job orchestration involved (this is covered in BDD)

Let's merge after experimental API will be healthy:

• Dataset import error (detection, Datumaro v1, video) - Unsupported media type NoneType #5915
• Only annotated images imported from YOLO dataset #5911
• Segmentation COCO dataset import fails with object is not iterable in polygons #6003

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

Adds a new backend test suite intended to catch regressions in Datumaro import + schema conversion against pre-collected “real” datasets, and wires it into CI so failures surface early when sample schemas or experimental Datumaro logic drift.

Changes:

• Added tests/datumaro_integration pytest suite that downloads a regression dataset bundle and validates import_dataset() + convert_to_schema() for supported sample types.
• Added a just test-datumaro-integration target and executed it in the backend CI workflow.
• Updated uv.lock (Datumaro git revision and related wheel URL entries).

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
application/backend/tests/datumaro_integration/test_datasets.py	New smoke test covering import + schema conversion per archive type.
application/backend/tests/datumaro_integration/conftest.py	Downloads/extracts regression archives and parametrizes tests over them.
application/backend/Justfile	Adds a dedicated command to run the new test suite (and tweaks BDD invocation verbosity/path).
.github/workflows/backend-lint-and-test.yaml	Runs Datumaro integration tests as part of backend CI.
application/backend/uv.lock	Moves pinned Datumaro revision and updates some locked artifact URLs.

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[github-actions]

🐳 Docker image sizes

Device	Size
cpu	3592.9 MB (3.51 GB)
xpu	10561.5 MB (10.31 GB)
cuda	11713.8 MB (11.44 GB)

[github-actions]

📊 Test coverage report

Metric	Coverage
Lines	56.2%
Functions	78.2%
Branches	87.4%
Statements	56.2%

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.

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