fix: update MCP smoke test to include 4 new tools (create/delete/list_sections/update)

Smoke test was silently failing in CI because 'bun --cwd apps/mcp run smoke'
printed usage (exit 0) — never actually ran. Now that we fixed the build step
to use 'cd apps/mcp && bun run smoke', the test runs and reveals 4 tools
were added to the MCP server but not updated in the expected list:
create_document, delete_document, list_sections, update_document.

Updated smoke.ts expected list from 10 → 14 tools.

apps/mcp/src/smoke.ts

@@ -15,16 +15,20 @@ async function main() {
   const names = tools.tools.map((t) => t.name).sort();
   console.log("tools:", names.join(", "));
   const expected = [
+    "create_document",
+    "delete_document",
     "get_document",
     "get_related_documents",
     "hybrid_search",
     "index_document",
     "list_documents",
+    "list_sections",
     "queue_status",
     "reindex_all",
     "restore_revision",
     "search_documents",
     "semantic_search",
+    "update_document",
   ].sort();
   if (JSON.stringify(names) !== JSON.stringify(expected)) {
     throw new Error(`tool set mismatch: ${names.join(",")}`);