test(scale): prove complete lifecycle ownership growth

[DecisionNerd]

The API 1x/2x/4x fixture covered phase ceilings but still used its older allocation estimate. Extend the existing public certifier regression with SCALE6/7/8 ownership growth, using ordered node/edge outputs and exact reopened counts. Each run checks all 15 raw owners against an independent filesystem inventory and validates complete retained/observed peak growth. Fixed protocol costs and allocation plateaus have explicit policies; malformed, flat, inflated, and truncated evidence is rejected.

CI runs the default tiny regression and the growth proof with its existing binaries. Existing phase/recovery assertions remain intact, with their scope clarified.

Validation: default and all three real growth lifecycles passed on OVHC-AGENCY. Retained bytes were 2,482,176 / 4,116,480 / 7,446,528; observed peaks were 2,621,440 / 4,337,664 / 7,839,744. All owner facts reconciled. Four validator tests with per-owner mutation cases, the existing real phase-linearity test, repository fast checks, formatting, workflow validation, and gate-registry checks passed. Independent LOW review is clear.

Canonical S20/S22 qualification remains in #951.

Closes #1168

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