Harden protocol hook lifecycle

[1vivy]

Summary

• Add protocol hook rollback/uninstall paths for failure cleanup while keeping hooks active for successful chainloaded ABL handoff.
• Add a same-session hook registry to avoid blind double-wrapping and fail closed on cross-mode reuse or registry install failure.
• Add lifecycle lint coverage and document the warm-reset Fastboot hang audit.

Validation

• git diff --check
• tests/045_mode_taxonomy_lint.sh
• tests/046_mode1_protocol_hook_lint.sh
• tests/047_cleanup_lint.sh
• tests/048_hook_lifecycle_lint.sh
• ./scripts/build.sh --mode 0
• ./scripts/build.sh --mode 1

Notes

• Stacked on PR Add mode-1 reserve write protection #18 work; keep PR Add mode-1 reserve write protection #18 as-is and review this as the separate hook lifecycle/safety follow-up.
• Leaves ABL FastbootLib as a hooked diagnostic surface; cleanup only runs on owned failure/return paths.

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[1vivy]

Superseded by #21, which keeps the same-session hook safety guard as a smaller detect-only/fail-closed registry and drops the broader uninstall/rollback lifecycle machinery.