The build-if-needed job (used by workflow_dispatch) was missing the
lfx package build, causing all cross-platform tests to fail with:
'No solution found: lfx>=0.4.0 required but only <=0.3.4 available'
Changes:
- Build lfx wheel in build-if-needed job
- Upload lfx artifact (adhoc-dist-lfx)
- Add lfx-artifact-name to job outputs
- Update all test jobs to fallback to build-if-needed outputs
for lfx artifact (matching existing base/main pattern)
4ee94e6ce6