Comment-only; behavior-preserving; 231 BattleNode tests green.
- OutboundSequencer._archive: name the unbounded-per-match growth + ack-prune point.
- NodeCrypto.BuildAes: SECURITY remarks on key-derived IV reuse + base64 entropy loss;
warn against caching the session key.
- MatchContext/BattlePlayer: FOOTGUN notes on reference-based record equality over the deck list.
- RecordTokensFrom: TRUST note on isSelf/idx overwrite; name the idx>deckCount guard for
untrusted peers (not added — trusted-LAN today).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Phase 1 foundation types for the v2 broker architecture. Nothing uses
them yet; they land alongside the existing v1.2 code so subsequent
tasks can extract the participant interface and impls.
