Common machine Git publisher candidate

PACKAGE_ID=20260713-064348_machine_git_builder_v1
PROFILE_VERSION=1

REFERENCE_MACHINE=vm101
REFERENCE_COMMIT=f0aa09394d6d0622b103a128b955135941c1060c
REFERENCE_SCRIPT=usr/local/sbin/router-vm101-git-publish.sh
REFERENCE_SCRIPT_SHA256=8189c34a7eb49633f03773eb93b453fd5265f846d32d6d28b7386c4753e9ca6b

COMMON_ENGINE=router-machine-git-publish.sh
COMMON_ENGINE_SHA256=de795151f06b8ab7ba7c921e0260332ad27b715b597a4fe81af9998f26e262f2

VM100_PROFILE=vm100-router-machine-git-source.conf
VM100_PROFILE_SHA256=b84ee561fd1576e2a0df83e867943aba6b15836aa8111c91abebd2603c9ad8dc

VM100_WRAPPER=router-vm100-git-publish.sh
VM100_WRAPPER_SHA256=481abae22e6dc554082700f590c40a809fc3dff44cc78dceb7adb3974f331a6a

Design:
- One identical publisher engine for VM100, VM101 and VM121.
- One strict, secret-free managed-path profile per machine.
- A thin compatibility wrapper per machine.
- The engine uses the same simulated-index, tracked-path union,
  future-tree secret scan, commit, push and remote verification model
  proven on VM101.
- VM100 has not been modified by creation of this candidate.