harden: .gitattributes (eol=lf) + UTF-8 Encoding Guard - #6
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Prevents two recurring issues found in the 2026-05-24 hardening wave: - .gitattributes `* text=auto eol=lf`: stops the CRLF churn that appeared on Windows clones (dozens of phantom-modified files). - Encoding Guard: a CI check that fails if any .github/ file is not valid UTF-8, catching the CP-1252 0x97 em-dash byte that silently broke zizmor's audit on HexGol (the audit aborted before reporting any findings). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Präventiv-Härtung gegen zwei in der Welle 2026-05-24 gefundene Muster: (1)
.gitattributes(* text=auto eol=lf) gegen CRLF-Churn auf Windows-Clones; (2) Encoding-Guard-Workflow, der CI rot macht wenn eine.github/-Datei kein valides UTF-8 ist — fängt das0x97-CP-1252-Byte, das zizmors Audit auf HexGol still abbrechen ließ. Guard SHA-gepinnt +permissions:{}+persist-credentials:false.