Align origin/main with upstream/main (GitHub). The two branches
diverged due to pre-rebase vs post-rebase merge commits for the
k8s-amd64-dockerfiles feature.
Includes: multi-stage Go compilation Dockerfiles, pan-bolt
inventory features, CRM relations, Excel import tooling,
proto/gRPC updates, migration scripts, and tools/ directory.
Excludes deploy/bin/ pre-compiled binaries (arm64, not needed
for amd64 K3s cluster; builds use multi-stage Dockerfiles now).
