fix: verify PVC exists after creation in ensureAgentDbPvc

Before creating a PVC, ensureAgentDbPvc checks if it exists and creates
it if not. However, the Kubernetes API may return a Success response
without actually creating the resource. This commit adds a verification
step after createPvc to confirm the PVC actually exists before returning.

Fixes FAR-84.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/server/execute.ts

@@ -897,6 +897,11 @@ export async function ensureAgentDbPvc(
     },
   }, kubeconfigPath);
 
+  const verified = await getPvc(namespace, pvcName, kubeconfigPath);
+  if (!verified) {
+    throw new Error(`PVC ${pvcName} was not created in namespace ${namespace}`);
+  }
+
   return pvcName;
 }