feat(workbench): add metadata-only session detail

internal/cloud/web-performance.test.ts

@@ -359,10 +359,10 @@ test("web performance store accepts Workbench UI lifecycle events without high-c
 });
 
 test("Workbench UI OTel spans include timeout activity diagnostics without raw trace ids", async () => {
-  const calls: any[] = [];
+  const calls: OtelExportRequestForTest[] = [];
   const originalFetch = globalThis.fetch;
   globalThis.fetch = async (_url: string | URL | Request, init?: RequestInit) => {
-    calls.push(JSON.parse(String(init?.body ?? "{}")));
+    calls.push(JSON.parse(String(init?.body ?? "{}")) as OtelExportRequestForTest);
     return new Response(null, { status: 200 });
   };
   try {
@@ -393,7 +393,7 @@ test("Workbench UI OTel spans include timeout activity diagnostics without raw t
     assert.equal(result.submitted, 1);
     assert.equal(calls.length, 1);
     const span = calls[0].resourceSpans[0].scopeSpans[0].spans[0];
-    const attrs = Object.fromEntries(span.attributes.map((item: any) => [item.key, item.value.stringValue ?? Number(item.value.intValue) ?? item.value.boolValue]));
+    const attrs = Object.fromEntries(span.attributes.map((item) => [item.key, item.value.stringValue ?? Number(item.value.intValue) ?? item.value.boolValue]));
     assert.equal(attrs["http.route"], "/v1/workbench/turns/:id");
     assert.equal(attrs["workbench.ui.timeout_name"], "workbench turn");
     assert.equal(attrs["workbench.ui.activity_waiting_for"], "code-agent");
@@ -405,6 +405,19 @@ test("Workbench UI OTel spans include timeout activity diagnostics without raw t
   }
 });
 
+interface OtelExportRequestForTest {
+  resourceSpans: Array<{
+    scopeSpans: Array<{
+      spans: Array<{
+        attributes: Array<{
+          key: string;
+          value: { stringValue?: string; intValue?: string | number; boolValue?: boolean };
+        }>;
+      }>;
+    }>;
+  }>;
+}
+
 test("web performance store drops unsupported Workbench labels and counts series limit drops", () => {
   const store = createWebPerformanceStore({ env: { HWLAB_METRICS_NAMESPACE: "hwlab-v03", HWLAB_GITOPS_TARGET: "v03" }, maxSeries: 1 });
   const first = store.record({
@@ -449,6 +462,7 @@ test("web performance store filters observability self-noise", () => {
 });
 
 test("web performance route templates keep metrics low-cardinality", () => {
+  assert.equal(webPerformanceRouteTemplate("/v1/workbench/sessions/ses_abcdef?includeMessages=false"), "/v1/workbench/sessions/:id?includeMessages=false");
   assert.equal(webPerformanceRouteTemplate("/v1/workbench/sessions/ses_abcdef/messages?traceId=trc_secret"), "/v1/workbench/sessions/:id/messages");
   assert.equal(webPerformanceRouteTemplate("#/skills"), "/skills");
 });