feat(fault): enable fresh-volume and bitrot scenarios

[GatewayJ]

Summary

Fresh-volume replacement and on-disk bitrot already have execution and artifact-verification paths, but their Planned status restricts them to qualification entry points. Mark both scenarios Executable and make their automatic and admin-deep recovery variants available through ordinary fault runs and single-attempt suites.

• Require an exact storage recovery case, destructive opt-in, and the existing dedicated-storage target checks; preserve compatibility with qualification commands.
• Bound direct runs by the configured duration and require explicit suite duration budgets, one scenario, and one repetition.
• Move the four runnable suites into fault/examples, update catalog documentation, and add regression coverage for planning, authorization, and shell preflight.

Validation

• Rust formatting and Clippy with warnings denied passed.
• All-target tests passed on Linux: 1,139 passed; one existing destructive live test ignored.
• All 10 example suites passed static validation.
• bash -n scripts/fault-test.sh and git diff --check passed.