add matrix debug

Author: habdelra

Diff for: .github/workflows/ci.yaml

@@ -375,9 +375,9 @@ jobs:
           NODE_OPTIONS: --max_old_space_size=4096
         working-directory: packages/host
       # TODO we shouldn't have to start matrix separately
-      # - name: Start matrix
-      #   run: pnpm start:matrix &
-      #   working-directory: packages/realm-server
+      - name: Start matrix
+        run: pnpm start:matrix &
+        working-directory: packages/realm-server
       - name: Start realm servers
         run: PG_INDEXER=true pnpm start:all &
         working-directory: packages/realm-server