Promotes the single change sitting in landing-silo. Nothing else comes
with it: the Fronius work is still in experimental-silo.
The plugin had been in the tree since the initial commit but was built by
nothing, absent from both PLUGIN_DIRS and debian/control, so no package
has ever shipped it and no build target changes here. It stays in
experimental-silo.
Promoted on an explicit exception rather than on the named hardware
validation the promotion criteria ask for: there is no hardware to
validate, only source that nothing compiles.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>