Parity false-green: densestSecondWindowSample/6 is registered as legacy arity-less harness case and drops ords #81

Confirmed on drift/meta 032983d.

The production twin gained the optional ords argument and is now arity 6 on both platforms, but the checked-in parity inventory still maps /5. The differential runners remain registered under the arity-less densestSecondWindowSample label and do not decode or forward args.ords.

Red evidence:

• parity_ledger.py --no-baseline reports exactly two relevant unmapped-function findings: Swift HRVAnalyzer.densestSecondWindowSample/6 and Kotlin HrvAnalyzer.densestSecondWindowSample/6.
• parity_ratchet.py ratchet --offline exits green with differential=78 and errors=0 because the arity-less label resolves by name to the new /6 declarations.
• registered_differential contains densestSecondWindowSample but no /6-qualified key; name-only match counts are 1/1.
• existing generator/schema/runners only carry tsSec, rrMs, srcCodes, halfWindowSec, and maxRowsPerSecond, so ords can drift without differential detection.

Acceptance:

• owner-qualified Swift/Kotlin /6 registry key and exact twin-map pair
• strict bounded ords schema aligned with tsSec/rrMs
• curated new-run/repeated-run/tie/boundary cases and exactly two isolated seeds
• both runners forward ords
• one semantic ords-forwarding mutant per platform is killed
• stale /5 mapping removed without broad inventory regeneration
• no production change.