Add research-only snapshot extender, PIT dollar-volume mask for signal IC, rank-only harness path, fingerprint+breadth runner, and docs. Fingerprint reproduced IC -0.045 / t -2.91 on prod.sqlite. No production gate/schedule changes.
Add research-only snapshot extender, PIT dollar-volume mask for signal IC, rank-only harness path, fingerprint+breadth runner, and docs. Fingerprint reproduced IC -0.045 / t -2.91 on prod.sqlite. No production gate/schedule changes.