Issue: Inconsistent error handling in conan graph commands compared to conan install

Issue: Inconsistent error handling in conan graph commands compared to conan install: a task in LegoFlow-SWE (Harbor dataset). However, conan graph info and conan graph build-order do not behave the same way. When the same missing or invalid dependency is encountered, these commands silently…

The task

However, `conan graph info` and `conan graph build-order` do **not** behave the same way. When the same missing or invalid dependency is encountered, these commands silently succeed (exit code 0) and do **not** emit the error messages that `conan install` would produce.

Part of Lego-X/LegoFlow-SWE.