feat(icrc1): add ICRC-153 freeze/unfreeze ledger endpoints and freeze guard#9557

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bogwar wants to merge 6 commits intoicrc-123-3-rosettafrom

icrc-123-4-ledger

Commits on Mar 24, 2026

refactor(icrc1): replace block-index freeze model with eager-cleanup override model

bogwar
and
claude
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