fix(agent): make sessions cluster truncation UTF-8 safe Refs #1734#878
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…ed Refs #1733 Convert advisory permission warning to hard error. An attacker who can write the artifact file can forge both bytes and checksums together, making the checksum gate useless for integrity. Changes: - medical_artifact.rs: world-writable and group-writable artifacts now bail before any data is read on Unix. - sharded_extractor.rs: update SAFETY comment to list both enforced gates (permission check + checksum verification). - Tests: replace advisory-success test with rejection tests for world-writable and group-writable, add secure-permissions test.
…m-ai into task/1733-umls-permission-hard-error
Replace byte-index slicing ([..40], [..35]) with char-boundary-safe truncation using char_indices().take(n). Prevents panic on multibyte UTF-8 session titles and concept labels.
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Summary
Replace byte-index slicing with char-boundary-safe truncation in
sessions clustercommand handler.Refs terraphim/terraphim-ai#1734 (Gitea)