The cdrstream uORB->IDL->CDR codegen floods the build log with noise:
- CycloneDDS idlc warns once per carried-over .msg comment that the
@verbatim annotation is unsupported (VehicleCommand alone emits 153).
Pass -Wno-unsupported-annotations via the idlc_generate WARNINGS list.
- rosidl_adapter prints a Reading/Writing line per message to stdout.
Filter those in msg2idl.py via builtins.print rather than redirecting
stdout, which the empy template engine breaks on. Errors still go to
stderr.
f0ee79d34b