Add global quotas and quota usage support for OBJ services

[zliang-akamai]

📝 Description

Add support for OBJ quota and global quota udpates.

✔️ How to Test

pytest test/integration/models/object_storage/test_obj_quotas.py -v

make test-unit

[Copilot]

Pull request overview

Adds client-side support for Object Storage global (account-level) quotas and enriches existing Object Storage quota models with quota type and usage support metadata, along with corresponding unit/integration tests and fixtures.

Changes:

• Add ObjectStorageGlobalQuota model with a usage() helper for global quota usage retrieval.
• Expose quota_type and has_usage properties on ObjectStorageQuota, and add ObjectStorageGroup.global_quotas() for listing global quotas.
• Extend unit/integration tests and fixtures to cover global quotas and the new quota fields.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
linode_api4/objects/object_storage.py	Adds quota_type/has_usage to ObjectStorageQuota and introduces ObjectStorageGlobalQuota model + usage call.
linode_api4/groups/object_storage.py	Adds ObjectStorageGroup.global_quotas() collection method.
test/unit/objects/object_storage_test.py	Adds unit coverage for new quota fields and global quota get/list/usage flows.
test/integration/models/object_storage/test_obj_quotas.py	Extends integration coverage for quota_type/has_usage and adds global quota tests and 404 handling cases.
test/fixtures/object-storage_quotas_obj-objects-us-ord-1.json	Updates quota fixture to include quota_type and has_usage.
test/fixtures/object-storage_quotas.json	Updates quotas list fixture to include quota_type and has_usage.
test/fixtures/object-storage_global-quotas.json	Adds fixture for global quotas list endpoint.
test/fixtures/object-storage_global-quotas_obj-access-keys-per-account.json	Adds fixture for a single global quota GET endpoint.
test/fixtures/object-storage_global-quotas_obj-access-keys-per-account_usage.json	Adds fixture for global quota usage endpoint.

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[Copilot]

The docstring still contains "API documentation: TBD" for a newly added public model. Please replace "TBD" with the correct docs URL (or remove the line) so users can discover the corresponding list/get endpoints, similar to the usage() method docstring below.

Suggested change

	API documentation: TBD

[Copilot]

This new group method docstring still says "API Documentation: TBD". Please replace it with the correct techdocs link (or remove the line) to avoid shipping placeholder documentation for a public API.

Suggested change

API Documentation: TBD

[Copilot]

These integration tests assert a specific substring in the ApiError string ("Usage not supported"), which can be unstable across API versions and error formatting changes. To make the test less brittle, consider asserting only the HTTP status (404) and/or validating a structured field such as exc.value.errors when present, rather than matching the rendered message.

Suggested change

assert "Usage not supported" in str(exc.value)

[Copilot]

Same issue here: asserting the exact error message substring makes the test brittle. Prefer checking status==404 and (optionally) structured error details instead of relying on str(ApiError) content.