feat(multiplayer): wire production proposal outbox delivery

server/store/outbox.go

@@ -28,6 +28,13 @@ WHERE published_at IS NULL
 ORDER BY created_at, event_id
 LIMIT $1`
 
+const OutboxUnpublishedProposalSelectSQL = `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 = 'proposal_changed'
+ORDER BY created_at, event_id
+LIMIT $1`
+
 const OutboxMarkPublishedSQL = `UPDATE outbox
 SET published_at = $2
 WHERE event_id = $1 AND published_at IS NULL`
@@ -88,10 +95,22 @@ func (d *OutboxDispatcher) Dispatch(ctx context.Context, limit int, publishedAt
 // ReadUnpublishedOutbox returns a bounded, stable ordered batch. It does not
 // mark rows before delivery: a worker crash therefore leaves events replayable.
 func ReadUnpublishedOutbox(ctx context.Context, db *sql.DB, limit int) ([]OutboxEvent, error) {
+	return readUnpublishedOutbox(ctx, db, limit, OutboxUnpublishedSelectSQL)
+}
+
+// ReadUnpublishedProposalOutbox returns only WebSocket-routable proposal
+// events. Other outbox consumers (for example result reconciliation) retain
+// ownership of their event types and cannot be acknowledged accidentally by
+// the control-plane WebSocket dispatcher.
+func ReadUnpublishedProposalOutbox(ctx context.Context, db *sql.DB, limit int) ([]OutboxEvent, error) {
+	return readUnpublishedOutbox(ctx, db, limit, OutboxUnpublishedProposalSelectSQL)
+}
+
+func readUnpublishedOutbox(ctx context.Context, db *sql.DB, limit int, query string) ([]OutboxEvent, error) {
 	if db == nil || limit < 1 || limit > 1000 {
 		return nil, fmt.Errorf("invalid outbox read arguments")
 	}
-	rows, err := db.QueryContext(ctx, OutboxUnpublishedSelectSQL, limit)
+	rows, err := db.QueryContext(ctx, query, limit)
 	if err != nil {
 		return nil, err
 	}

server/store/outbox_test.go

@@ -10,8 +10,9 @@ import (
 
 func TestOutboxSQLPreservesReplayableOrderedReadAndPublishAck(t *testing.T) {
 	for query, fragments := range map[string][]string{
-		OutboxUnpublishedSelectSQL: {"published_at IS NULL", "ORDER BY created_at, event_id", "LIMIT $1"},
-		OutboxMarkPublishedSQL:     {"published_at = $2", "event_id = $1", "published_at IS NULL"},
+		OutboxUnpublishedSelectSQL:         {"published_at IS NULL", "ORDER BY created_at, event_id", "LIMIT $1"},
+		OutboxUnpublishedProposalSelectSQL: {"published_at IS NULL", "event_type = 'proposal_changed'", "ORDER BY created_at, event_id", "LIMIT $1"},
+		OutboxMarkPublishedSQL:             {"published_at = $2", "event_id = $1", "published_at IS NULL"},
 	} {
 		for _, fragment := range fragments {
 			if !contains(query, fragment) {