Fixes for Nix Builds: Timestamp Caching and Command Accumulation#465

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pseudofractal wants to merge 2 commits intoiraf-community:mainfrom

pseudofractal:fix-utime-caching

Commits on Feb 5, 2026

Fix pre-1980 timestamp bugs
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Commits on Feb 6, 2026

irafcl: Fix command line accumulation in irafcl.sh
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