resolve-suspense: process new SX scripts before resolving

Streaming resolve scripts arrive after boot, so any extra component
defs sent as <script type="text/sx"> tags weren't being loaded.
Fix in the spec (boot.sx): call (process-sx-scripts nil) at the
start of resolve-suspense so late-arriving component defs are
available in componentEnv before rendering.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/static/scripts/sx.js

@@ -1597,6 +1597,8 @@
      * new SX content, and replaces the wrapper's children.
      */
     resolveSuspense: function (id, sx) {
+      // Process any new <script type="text/sx"> tags (streaming extras)
+      Sx.processScripts();
       var el = document.querySelector('[data-suspense="' + id + '"]');
       if (!el) {
         console.warn("[sx] resolveSuspense: no element for id=" + id);