tsuku-dev/tsuku

AI Summary: This GitHub issue aims to significantly reduce the unit test suite duration by optimizing `TestFetchReleaseAssets_Timeout` in the `internal/version` package. Currently, this single test uses a 35-second sleep to simulate a timeout, making it responsible for over 90% of the total test time. The proposed solution involves replacing this long sleep with a faster method, such as using shorter `context.WithTimeout` durations or mocking HTTP transport.