Add GitHub native code coverage reporting to CI

[code-coverage-agent]

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Replaces Codecov with GitHub's native coverage API across all three SDK libraries.

pytest-cov.yml

• Added --cov-report=xml:coverage.xml to produce Cobertura XML via pytest-cov's native reporter (trustworthy, lossless)
• Upload artifact step (Python 3.12 only per lib, skipped for fork PRs) to avoid 4× duplicate uploads per library
• New upload-coverage-python matrix job (one per lib) using actions/upload-code-coverage@v1 with code-quality: write permission isolated to that job

.gitignore

• Added coverage.xml, .coverage, htmlcov/

Release note for CHANGELOG:

NONE

[github-code-quality]

Code Coverage Overview

Languages: Python

Python / code-coverage-agent

The overall line coverage in commit 098d0d7 in the code-coverage-agent/... branch is 58%. Line coverage data for the main branch is not yet available.

Show a line coverage summary of the most covered files.

File	main	code-coverage-agent/... 098d0d7	+/-
scaleway/instan.../v1/__init__.py	—	100%	—
scaleway/instan...ypes_private.py	—	100%	—
scaleway/k8s/v1/types.py	—	99%	—
scaleway/vpc/v2/types.py	—	99%	—
scaleway/instance/v1/types.py	—	98%	—
scaleway/mongodb/v1/types.py	—	98%	—
scaleway/block/...alpha1/types.py	—	98%	—
scaleway/vpc/v2/marshalling.py	—	28%	—
scaleway/instan.../marshalling.py	—	24%	—
scaleway/k8s/v1/marshalling.py	—	23%	—

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_{Updated August 24, 2026 10:02 UTC}