feat(meta-service): add snapshot V004 streaming protocol #18763
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Implements KV-entry streaming for snapshot transmission, replacing V003's binary chunk approach in future. The new protocol streams individual key-value entries in protobuf format, enabling transfers and cross-format compatibility for rolling upgrades. Key improvements: - Memory efficient: processes entries as they arrive vs buffering entire snapshot - Cross-format support: enables rolling upgrades between snapshot formats - Fallback compatibility: automatically falls back to V003 for older nodes - Structured data: protobuf streaming vs raw binary chunks
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Summary
feat(meta-service): add snapshot V004 streaming protocol
Implements KV-entry streaming for snapshot transmission, replacing
V003's binary chunk approach in future. The new protocol streams
individual key-value entries in protobuf format, enabling
transfers and cross-format compatibility for rolling upgrades.
Key improvements:
Tests
Type of change
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