Bug: Logger does not work in Open

[lovromazgon]

In PR #4 the context passed to Open was replaced with a new context so that we can control how long it stays open. The problem is that this approach doesn't forward the context values that might be present in the original context, like for example the logger.

We should probably explore another approach like detaching the parent cancellation from the context instead of creating a fresh context (see this thread for more info).