Describe the bug
If you try to stream both standardOutput and standardError from the Execution in the closure-based run method, it fails with Fatal error: The standard output has already been consumed.

To Reproduce
Steps to reproduce the behavior:

1. Attempt to access execution.standardOutput and execution.standardError in the same run closure.

Expected behavior
It should be possible to access both sequenced outputs.

Environment (please complete the following information):

• OS: macOS 15.4.1 (24E263)
• Swift version: swiftlang-6.1.0.110.21 clang-1700.0.13.3

Additional context
This looks like a simple copy/paste bug in Execution.swift, the consumption state is checking for .standardOutputConsumed rather than . standardErrorConsumed for the standardError case.