hosts.api_key, customer_configs.api_key / retrieval_password and host_pbs_secrets.value now hold the
R-821/R-133 seal (enc:v1:, OFFSITE_SECRET_KEY). The two API keys get an api_key_hash lookup twin
(SHA-256, backfilled keyless in migrate()), so box authentication never needs the sealing key; a row
with no hash is matched on its plaintext only while it is plaintext. SealLegacyBoxSecrets seals legacy
rows at start-up (idempotent, non-fatal). A sealed value that does not open sets SecretsUnreadable:
serve/compare paths answer 500, saves refuse the record, the PBS token is not burned.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
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