chore(llms): gate live model tests behind test:live (#610)

* chore(llms): gate live model tests behind test:live

Keep *.live.test.ts out of npm test so local CI stays fast; run them
explicitly via npm run test:live when checking provider compatibility.

* chore: skill gh permission

package.json

@@ -37,6 +37,7 @@
         "postpublish": "npm run postpublish --workspaces --if-present",
         "typecheck": "tsc --noEmit -p tsconfig.typecheck.json && tsc --noEmit -p packages/extension/tsconfig.json",
         "test": "npm test --workspaces --if-present",
+        "test:live": "npm run test:live --workspaces --if-present",
         "lint": "eslint .",
         "ci": "node scripts/ci.js",
         "cleanup": "rm -rf packages/*/dist && rm -rf packages/*/.output",