Read link targets as bytes before strict UTF-8 admission. Retain malformed targets as unreadable with source hex; preserve literal replacement characters and valid BOM-prefixed targets.
Fixes#6765
Mark directories with non-UTF-8 names unsupported without following replacement-character paths, while retaining readable sibling observations.
Fixes#6653
Normalize path facts once at the owning filesystem boundary, preserve caller spelling and unavailable inventory members, and retain typed read failures. Record exclusion entry kinds so only proven directories can establish descendant symlink targets; omitted legacy kinds stay unknown.
Reviewed fixes include #1969, #2642, #2759, and #2994.
Validation: 26 reference graph source tests passed; prior artifact checks passed 275 tests with one Windows-only skip. Updated compiled import workflows are included in final validation after regeneration.