Add Scaleway Object Storage backup integration

[BjoernPetersen]

Proposed change

This PR adds a new Scaleway Object Storage integration that allows users to store Home Assistant backups in Scaleway Object Storage.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

No AI tools were used to create this PR (except for the Copilot PR review over here).

I choose the aiohttp-s3-client package as a dependency because - other than aiobotocore - it's a fully async dependendency and offers type hints without a separate stub package.

I plan to add further improvements and achieve a higher ranking on the quality scale in the future. This PR just adds what I consider a "basic" feature set. I'm sorry it's still that large, but I guess that's unavoidable when adding a completely new integration 😅.

• Link to documentation pull request: Add docs for Scaleway Object Storage home-assistant.io#44397
• Link to brands repository pull request: Add assets for Scaleway Object Storage brands#10056

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io
  • Pending: Add docs for Scaleway Object Storage home-assistant.io#44397

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• (not applicable) For the updated dependencies a diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[home-assistant]

Hi @BjoernPetersen

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[Copilot]

Pull request overview

Adds a new Home Assistant integration to store backups in Scaleway Object Storage, including config flow support and initial test coverage.

Changes:

• Introduces scaleway_object_storage integration (config flow, backup agent, exceptions, translations, quality scale metadata).
• Adds config flow tests (user / reauth / reconfigure) and shared fixtures.
• Registers dependency (aiohttp-s3-client), code ownership, strict typing, and generated registry updates.

Reviewed changes

Copilot reviewed 19 out of 21 changed files in this pull request and generated 19 comments.

Show a summary per file

File	Description
tests/components/scaleway_object_storage/test_config_flow_step_user.py	Adds user-step config flow tests.
tests/components/scaleway_object_storage/test_config_flow_step_reconfigure.py	Adds reconfigure-step config flow tests.
tests/components/scaleway_object_storage/test_config_flow_step_reauth.py	Adds reauth-step config flow tests.
tests/components/scaleway_object_storage/conftest.py	Adds shared fixtures for Scaleway Object Storage tests.
tests/components/scaleway_object_storage/init.py	Initializes the test package.
requirements_test_all.txt	Adds aiohttp-s3-client to test requirements.
requirements_all.txt	Adds aiohttp-s3-client to runtime requirements.
mypy.ini	Enables strict mypy settings for the new integration package.
homeassistant/generated/integrations.json	Registers the new integration in generated metadata.
homeassistant/generated/config_flows.py	Adds the integration domain to generated config flow registry.
homeassistant/components/scaleway_object_storage/strings.json	Adds config flow text, selector options, and exception translations.
homeassistant/components/scaleway_object_storage/quality_scale.yaml	Declares quality scale compliance status for the integration.
homeassistant/components/scaleway_object_storage/manifest.json	Defines integration metadata and dependency requirements.
homeassistant/components/scaleway_object_storage/helpers.py	Adds S3 client creation, connection check, and metadata read helpers.
homeassistant/components/scaleway_object_storage/exceptions.py	Adds translated, typed exception hierarchy for config/runtime errors.
homeassistant/components/scaleway_object_storage/const.py	Adds integration constants (config keys, limits, headers).
homeassistant/components/scaleway_object_storage/config_flow.py	Implements user / reauth / reconfigure config flow steps.
homeassistant/components/scaleway_object_storage/backup.py	Implements BackupAgent against Scaleway S3-compatible object storage.
homeassistant/components/scaleway_object_storage/init.py	Sets up the config entry and wires runtime client creation.
CODEOWNERS	Assigns ownership for the new integration and its tests.
.strict-typing	Marks the new integration for strict typing enforcement.

[Copilot]

Pull request overview

Copilot reviewed 19 out of 21 changed files in this pull request and generated 9 comments.

[Copilot]

Pull request overview

Copilot reviewed 19 out of 21 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 21 out of 23 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 22 out of 24 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 22 out of 24 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 22 out of 24 changed files in this pull request and generated 2 comments.

[joostlek]

Isn't this something the library should handle?

(Hold off on any library changes for now, will ask someone who worked on backup integrations to have a look)

[BjoernPetersen]

Now that you pointed it out, I at least found a way to simplify this to two cases.

As far as I saw, other S3-based backup integrations expect an endpoint URL and a bucket name and let aiobotocore auto-select the addressing style. As noted in the original PR body, I decided against aiobotocore because its asyncio support is pretty flawed. I also thought that it's more user-friendly to avoid an endpoint URL user input since Scaleway offers very few choices anyway.

Other than (aio)botocore, the aiohttp-s3-client library will not build a virtual-host style URL by itself, so further simplifying the integration code here would mean either changing the library, or always using path-style addressing. S3-API providers generally prefer it if you use virtual-host style (AWS has deprecated path-style addressing years ago). In any case, the library will never fill in Scaleway-specifics (s3.{region}.scw.cloud) for us.

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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Stale

[Copilot]

Pull request overview

Copilot reviewed 20 out of 22 changed files in this pull request and generated no new comments.