AppEngine built-in tag is always present and constantly updating (~1s),
making it a more reliable probe than a user-deployed TestChildObject tag.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Split LmxProxy Host and Client into a self-contained solution under lmxproxy/,
ported from the ScadaBridge monorepo with updated namespaces (ZB.MOM.WW.LmxProxy.*).
Client project (.NET 10) inlines Core/DataEngine dependencies and builds clean.
Host project (.NET Fx 4.8) retains ArchestrA.MXAccess for Windows deployment.
Added windev.md documenting the WW_DEV_VM development environment setup.
