Updated all test methods to use asynchronous programming with
`async` and `await`, replacing synchronous calls with
`.GetAwaiter().GetResult()`. This improves readability and
aligns with modern C# practices.
Renamed test methods to reflect their asynchronous nature and
better describe their behavior. Updated exception handling to
validate HTTP methods and request URIs while maintaining
original assertions.
Applied changes consistently across multiple test classes,
including `CommonApiTests`, `EndpointAuthApiTests`,
`EndpointParamsApiTests`, `EndpointsApiTests`,
`ProfileApiTests`, `RecActionApiTests`, and `ResultApiTests`.
Added a new test class `EndpointsApiTests` to validate the `Endpoints` API functionality in the `ReC.Client`.
Tests include:
- Dependency injection resolution for the `Endpoints` API.
- Behavior of `CreateAsync` with minimal payload.
- Behavior of `UpdateAsync` with an unknown ID.
- Validation of `DeleteAsync` sending payload as query string.
Introduced necessary `using` directives and utilized the `CreateScopedClient` helper method for resource management.
