Pass VERSION from CI into Docker builds and embed it into the Go binary via ldflags. Updated .github workflow to supply --build-arg VERSION for both architectures. Added ARG VERSION and logic in Dockerfile and Dockerfile.arm64 to derive the version from git (git describe --tags) or fall back to the provided build-arg, then set it with -X during go build. Changed VERSION in machinery/src/utils/main.go from a const to a var defaulting to "0.0.0" and documented that it is overridden at build time. This ensures released images contain the correct agent version while local/dev builds keep a sensible default.
