The PR patches `Stream.close()` and conditionally `MessageStream.close()` to finish spans when the connection is closed early, but does not patch the corresponding `AsyncStream.close()` or `AsyncMessageStream.close()` methods. If a user calls `close()` on an async stream before fully consuming the iterator, the span will not be finished properly, leaving orphaned spans. This creates inconsistent behavior between sync and async APIs.

The `_wrap_close` function calls `_finish_streaming_span()` without wrapping it in `capture_internal_exceptions()`, unlike the same call in `_wrap_synchronous_message_iterator()` (line 455). If an exception occurs during span finishing (e.g., unexpected state, SDK bug), it would prevent the original `close()` method from being called, potentially leaking HTTP connections and propagating unexpected exceptions to user code.