Return the validated descriptor and its original metadata from regular-file
admission. Propagate that contract through owned reads, hashes, snapshots,
artifact inventory and provider file workflows instead of replacing initial
facts with another stat. Keep arbitrary output-handle operations separate.
Preserve final descriptor/path identity proofs, borrowed-source verification,
BigInt precision, cancellation provenance and failed-close ownership. Remove
the obsolete source and owned-ZIP baseline stages and update their consumers
and regressions. Tie read completion faults to actual reads instead of the
retired duplicate stat; instrument real handles without fake handle wrappers.
Validation: fresh runtime/catalog build; focused source, lifecycle, filesystem,
CLI/MCP and authored provider-fixture tests; full static checks; docs checks;
test discovery; duplication check. Platform-specific cases remain skipped on
macOS. No installed provider or device behavior was verified.
Derive the read limit from the accepted safe decimal PID plus a tolerated CRLF and overflow sentinel. Retain short-read handling, cached valid facts and existing descriptor ownership and handshake semantics.
Fixes#5057
Own journal, capture, result and PID descriptors through confirmed release. Preserve parsed facts and exact cancellation reasons while retaining unresolved children and gating runtime removal on their completion.
Refs #4742
morluto