test(smoke): use node:crypto generateKeyPairSync (fix ESM crypto import)

Author: GsCommand

tests/smoke.mjs

@@ -12,7 +12,7 @@ function __b64(s){ return Buffer.from(s, "utf8").toString("base64"); }
 
 // Create an ephemeral Ed25519 keypair so the runtime can mint receipts during smoke.
 // This avoids depending on developer machine env vars.
-const { privateKey: __smokePrivKey, publicKey: __smokePubKey } = crypto.generateKeyPairSync("ed25519");
+const { privateKey: __smokePrivKey, publicKey: __smokePubKey } = generateKeyPairSync("ed25519");
 const __smokePrivPem = __smokePrivKey.export({ format: "pem", type: "pkcs8" });
 const __smokePubPem  = __smokePubKey.export({ format: "pem", type: "spki" });
 const __smokePrivB64 = __b64(__smokePrivPem);