KiCad 9's IPC API returns Footprint objects where fp.definition lacks
the library_link attribute, causing all component queries to fail with
"'Footprint' object has no attribute 'library_link'" warnings and
returning 0 components. This adds a hasattr check with fallback to
fp.definition.id.
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
