The per-ingress-nginx egress CNP enumerates app namespaces; coder was
missing, so requests to coder.renner.uno dead-ended at
"upstream timed out" even though coder's own CNP allowed the inbound
side. Add coder to the allowlist, matching the other apps.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>