Standalone weed s3 only shut its servers down when shutdownCtx was set,
which only weed mini does. On SIGTERM the interrupt hooks ran and the
process exited with requests still in flight, so clients saw connection
resets during rolling restarts.
Register an interrupt hook that drains every S3 HTTP(S) listener
(including the local and unix socket ones, and the Iceberg and Lance
servers) for up to 15s alongside a bounded gRPC GracefulStop, then closes
the S3 API server, reusing the filer's shutdown helper. Serve exits now
join that shutdown so the process does not exit mid-drain, and the
secondary listeners tolerate http.ErrServerClosed instead of exiting
fatally.
Co-authored-by: Chris Lu <chrislusf@users.noreply.github.com>
Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
