Cancelled Netty responses are being treated as errors since 1.65.0

[Venorcis]

Tracer Version(s)

1.65.0

Java Version(s)

25.2.4

JVM Vendor

Oracle GraalVM

Bug Report

#11941 (released in 1.65.0) started surfacing NativeIoExceptions from cancelled Reactor Netty responses as server-span errors with a synthetic 500; the existing broken-pipe suppression in DDSpan.addThrowable doesn't match Netty's writevAddresses(..) failed with error(-32): Broken pipe message format.

Expected Behavior

Client cancellations do not get suddenly reported as errors in all of Datadog.

Reproduction Code

No response