Restrict version parameter to supported values (1 or 3) via schema
validation instead of accepting any integer. Add content-based format
detection when version is not provided, using bfc/parse-file-format
to inspect file magic bytes.
Closes#11105
AI-assisted-by: qwen3.7-plus
Add :closed true to schema:import-binfile to reject unknown keys.
Remove file-id from handler destructuring, config binding, and audit
props to prevent specifying a target file on import.
AI-assisted-by: mimo-v2.5-pro
