* feat: set default owner for cycle creation if not provided
* Updated CycleListCreateAPIEndpoint to assign the current user as the owner when the 'owned_by' field is not included in the request data.
* Enhanced the CycleCreateSerializer initialization to ensure proper ownership assignment during cycle creation.
* feat: add comprehensive tests for Cycle API endpoints
* Introduced a new test suite for Cycle API endpoints, covering creation, retrieval, updating, and deletion of cycles.
* Implemented tests for various scenarios including successful operations, invalid data handling, and conflict resolution with external IDs.
* Enhanced test coverage for listing cycles with different view filters and verifying cycle metrics annotations.
* feat: enhance CycleCreateSerializer to include ownership assignment
* Added 'owned_by' field to CycleCreateSerializer to specify the user who owns the cycle.
* Updated CycleListCreateAPIEndpoint to remove redundant ownership assignment logic, relying on the serializer to handle default ownership.
* Ensured that if 'owned_by' is not provided, it defaults to the current user during cycle creation.
* fix: correct assertion syntax in CycleListCreateAPIEndpoint tests
* Updated the assertion in the test for successful cycle creation to use the correct syntax for checking the response status code.
* Ensured that the test accurately verifies the expected behavior of the API endpoint.
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