feat(multiplayer): publish allocation state events

server/store/outbox.go

@@ -42,6 +42,13 @@ WHERE published_at IS NULL AND event_type = 'match_completed'
 ORDER BY created_at, event_id
 LIMIT $1`
 
+const OutboxUnpublishedStateSelectSQL = `SELECT event_id, aggregate_type, aggregate_id, revision,
+    event_type, payload, created_at, published_at
+FROM outbox
+WHERE published_at IS NULL AND event_type = 'state_changed'
+ORDER BY created_at, event_id
+LIMIT $1`
+
 const MatchParticipantIDsSQL = `SELECT player_id
 FROM match_participants
 WHERE match_id = $1
@@ -125,6 +132,12 @@ func ReadUnpublishedResultOutbox(ctx context.Context, db *sql.DB, limit int) ([]
 	return readUnpublishedOutbox(ctx, db, limit, OutboxUnpublishedResultSelectSQL)
 }
 
+// ReadUnpublishedStateOutbox returns lifecycle state events, leaving proposal
+// and result rows to their dedicated consumers.
+func ReadUnpublishedStateOutbox(ctx context.Context, db *sql.DB, limit int) ([]OutboxEvent, error) {
+	return readUnpublishedOutbox(ctx, db, limit, OutboxUnpublishedStateSelectSQL)
+}
+
 func ReadMatchParticipantIDs(ctx context.Context, db *sql.DB, matchID string) ([]string, error) {
 	if db == nil || matchID == "" {
 		return nil, fmt.Errorf("invalid match participant read arguments")