fix: 🐛 Diagnose Windows file ancestors before missing paths - #86

Windows reports a child of a regular file as NoSuchFileException. Capture and inspect therefore advised creating a missing directory even though a file blocked the path. Validate the lexical parent before reporting a missing path, so nested file ancestors receive the existing not-a-directory guidance while genuinely missing directories retain their existing message.

The correction adds one line and preserves error codes, integrity checks, existing contents and genuine filesystem failures. No tests were changed, weakened or skipped. The existing three CapturePathTest cases fail before the change and pass afterward on native Windows, covering both capture formats and resume paths.

Validation:

• Complete hosted Linux and Windows suites and native command package verification pass for the exact head in run 43251124659. Required PR CI also passes.
• Line coverage 95.35% and branch coverage 81.08%, with unchanged thresholds.
• Both ZIP checksums verify; Linux and Windows share byte-identical JVM payloads. The downloaded Windows executable passes version, redirected help, argument-error, invalid/missing-path and read-only grouped inspection checks; capture bytes remain unchanged.

Release-readiness run 43247008118 exposed the original Windows failure. No master promotion, release publication or version change is included.

Refs #75