Retain process input and unexpected failure diagnostics through the shared error projector. Preserve filesystem causes and firmware validation issues, and mark unchanged invalid requests nonretryable.
Use typed stat settlement and parse unknown command failures without losing null or undefined rejection causes.
Refs #5397, #5401, #5402, #5642
Readable executable format refusals report their source format reason and an unsupported-target category instead of misleading missing-path advice. Preserve actual path/permission errors, WASM static recovery, and native target source inspection.
Verified on Linux x64 through actual CLI/fresh stdio MCP: three NE/LE/LX controls, exact canonical projection parity, unchanged bytes, responsiveness and a missing-path control. 103 focused tests across nine files, full static gate and generated documentation passed.
Fixes#1979
Refs #1852
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Co-authored-by: Ysopwnable <161784452+N0zoM1z0@users.noreply.github.com>
Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
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