Records resident memory alongside the Go heap size and dumps heap and
goroutine profiles once memory passes a threshold, while the process is
still alive to ask.
The ratio between the two numbers is what identifies the source: barnard's
Go heap sits at a few megabytes in normal operation, so memory growth with a
flat Go heap points at cgo allocations in OpenAL, opus or rnnoise, which the
Go collector cannot see and therefore never applies back pressure to.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
