81155beb0d
Adds 14 chaos tests validating zero-data-loss at the migration cutover boundary under all AE/delta-pass configurations. Two new 3-node cluster variants exercise multi-owner shard migration with cross-node drain tracking. Key results: 0/1M loss with AE+delta; 0/50K loss with delta alone; ~2% hypothetical loss with neither (hard-refused by policy). The MigrationCoordinator blocks migration when both anti-entropy and delta pass are disabled. Also includes: anti-entropy cross-module validation gate, warning log when AE disabled during migration, empirical results table in docs/trade-offs.md, and plan §15 OP#1 status update to verified. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> |
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