Retain independently bound runtime failures when counterpart evidence is unknown #467

🤖 Generated by the Agentic Engineer

Problem

A valid, current, scoped positive failure recommends contraction only while its intercepted-negative counterpart is complete. Removing or future-dating that counterpart erases the known failure into HOLD.

Reproduced offline against freshly fetched main with a valid control. Inspected guidance and repositories were not executed, and no inference or provider test was launched.

Acceptance criteria

Bind each failure report independently for loss; reserve joint completeness for replacement support; preserve HOLD for a failing report that is itself foreign, future or unbound. Add recovery and negative controls. Size: S.

Part of #223.