Summary

Improved Queue shutdown functionality to ensure graceful termination of in-progress operations. The changes provide more predictable shutdown behavior by properly signaling and awaiting pending tasks before releasing resources.

Changes

• Enhanced shutdown logic in Queue to gracefully complete or cancel in-flight items
• Added proper signaling mechanism to coordinate shutdown across concurrent consumers
• Ensured resource cleanup occurs only after all pending operations have settled

Testing

• Compiled successfully via coreJVM/compile
• Existing test suite passes

/claim #9844