- Updated dependencies to use Pydantic v2.
- Refactored code to align with Pydantic v2 API changes.
- Adjusted data model definitions to accommodate new validation and settings features.
- Modified any custom validation logic or configurations affected by the upgrade.

- Fixed validation errors caused by incomplete response model.

…e subscription status via response headers

- Removed the `subscribe` field from `Datapoint`, `DatapointUpdate`, and `DatapointPartialUpdate` models.
- Updated `add_datapoint` endpoint to return subscription status via response headers.
- Updated `delete_datapoint` endpoint to return unsubscription status via response headers.
- Ensured all database queries properly map records to the `Datapoint` model to avoid validation errors.
- Adjusted response handling to conform to the updated models and prevent response validation errors.

…' into 8-forbid-extra-fields-in-payload

…ps_kwargs

…ps_kwargs

…ps_kwargs

…ps_kwargs and changed filip version to 0.3.0

…ring

…ring

…del_dump_json(), matchDatapoint attributes are replaced with connected in tests

…del_copy(), some small bugs in tests are fixed