fix: remove name field from Cloud Run create body (v2 API requires empty)

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/cloud-run-workspace.ts

@@ -65,8 +65,8 @@ export async function provisionTheiaWorkspace(
   const token = await getAccessToken();
   const serviceName = `theia-${slug}`.slice(0, 49); // Cloud Run max 49 chars
 
+  // Cloud Run v2: name must be empty in the body — it's passed via ?serviceId= in the URL
   const serviceBody = {
-    name: `${CLOUD_RUN_API}/${serviceName}`,
     template: {
       scaling: {
         minInstanceCount: 0,   // scale to zero when idle