fix: verify iris_dri.so deps at build time + auto-fix missing libs
Build now runs ldd on iris_dri.so inside the initramfs, finds any
missing deps, copies them from the build system, and re-runs the
transitive dep resolver. Logs missing/fixed deps to build output.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>