MemberMetadata

Per-member display names tracked with last-writer-wins semantics, backed by LWWMap.

Each member can set their own display name. Concurrent writes from different replicas resolve by (timestamp, replicaId) — the higher-timestamp write wins; when timestamps tie, the higher ReplicaId value (lexicographic) wins, giving a deterministic but arbitrary outcome.

Immutable value type

Every mutating operation returns a new MemberMetadata — the receiver is not modified. Wire the return value back into your state holder.

Clock-skew warning

This type inherits LWWMap's clock-skew caveat: wall-clock timestamps work only when clocks are well-synchronized across all replicas. Prefer a Hybrid Logical Clock above this layer when clock drift is a concern.