Fix provenance of empty unbound inputs#968

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LanderOtto wants to merge 2 commits intomasterfrom

save-empty-unbound-in

Commits on Feb 26, 2026

This commit resolves an issue where unbound input ports with empty tokens lacked persistent id, leading to invalid entries in the provenance database.
LanderOtto
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Refactor
LanderOtto
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