Remove DEFAULT_STORAGE_KEY, DEFAULT_WORM_KEY, secret_ledger_key, b'nuncio_ledger_secret'; fail closed when absent. AC: no crypto key literal in src/.
Done on dev (commit 9c83032): all hardcoded key literals removed; OsKeyring vault with fail-closed CSPRNG provisioning. Security-reviewed, APPROVED.
dev
9c83032
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Remove DEFAULT_STORAGE_KEY, DEFAULT_WORM_KEY, secret_ledger_key, b'nuncio_ledger_secret'; fail closed when absent. AC: no crypto key literal in src/.
Done on
dev(commit9c83032): all hardcoded key literals removed; OsKeyring vault with fail-closed CSPRNG provisioning. Security-reviewed, APPROVED.