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e2203b2a0b
Routing object-lock buckets off the distributed lock needs the retention and legal-hold check to run atomically with the write, under the per-path lock. Move just the comparison into the filer, not the S3 semantics: two generic clause kinds on an extended attribute. IF_EXTENDED_NOT_EQUAL blocks while extended[ext_key] equals ext_value (a legal hold). IF_EXTENDED_TIME_ELAPSED blocks while extended[ext_key], read as a unix- second deadline, is in the future against the filer's clock (retention); a malformed deadline fails safe. The caller composes these from the object-lock state and, for a governance bypass, simply omits the retention clause once the bypass is authorized -- the filer makes no authorization decision and keeps no S3 knowledge.