Classify canonical physical file outcomes through the provider mapper before composing cleanup. Retain unknown capabilities as unresolved and replace runtime failure maps with exact leases, including mixed cleanup and partial retry.
Keep completed-read cancellation output and cleanup history. Closes#4865.
Validation: 179 unique focused tests passed across 13 selected files, 7 Linux-only skips; static checks, docs checks and 1551-file discovery passed. Authored Node producers and controlled real-descriptor faults do not qualify native providers.
morluto
3fcba07962