Added a `using` directive for `System.Text.Json` to support JSON
operations. Introduced two new test methods:
`GetDynamicAsync_without_filters_returns_dynamic_payload_or_throws_not_found`
to validate the behavior of `GetDynamicAsync` without filters, and
`GetDynamicAsync_with_unknown_profile_throws_not_found` to ensure
proper handling of unknown profile IDs.
Introduced a new test class `RecActionApiTests` to validate the behavior of the `RecActions` API client.
- Added tests for `GetAsync`, `CreateAsync`, `UpdateAsync`, `DeleteAsync`, and `InvokeAsync` methods to ensure proper handling of valid and invalid inputs.
- Verified dependency injection resolution for `RecClient` and `RecActions`.
- Included assertions for HTTP status codes, request methods, and query parameters.
- Handled edge cases such as missing test data with `Assert.Pass` or `Assert.Ignore`.
- Utilized scoped clients for test isolation and resource management.
These changes improve test coverage and ensure the reliability of the `RecActions` API client.
