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
Retain the primary error through cleanup composition and resolve its presentation only after live ownership confirms release. Preserve historical diagnostics separately from producer facts.
Validate domain primary types, nested owners, denied retry and late observations; exercise public CLI and MCP projection plus firmware descriptor retry. Focused tests, source controls, static checks and docs pass. Native providers were not verified.
Refs: #4628
morluto