32211 Add state parent class to subscription patch request

[torgeirbm]

Added parent class with state parameters that the ims subscription management api allows for the patch endpoint. Intentionally left the datalastaccessed parameter out as this is intended to be used/maintained via function app.
Added some simple tests for the endpoint.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

I Have run existing and new tests

Checklist:

• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding changes to the architecture
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Copilot]

Pull request overview

Adds support for patching IMS subscription “state” fields by introducing a dedicated parent TypedDict model and expanding the subscription patch request model accordingly. Also extends the existing API test suite with coverage for the IMS Subscriptions Management PATCH endpoint.

Changes:

• Introduced SubscriptionStatePatchModel and made SubscriptionPatchRequestItem inherit from it.
• Corrected plantSapCode type in SubscriptionPatchRequestItem to Optional[str].
• Added IMS Subscriptions Management API PATCH tests and minor assertion formatting cleanup.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
tests/test_api.py	Adds fixture and tests for IMSSubscriptionsManagementAPI.patch_subscription_by_uid; refactors a few assertions for readability.
src/omnia_timeseries/models.py	Adds state patch parent TypedDict and updates the subscription patch request model (including fixing plantSapCode type).

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[janny93]

LGTM