fix: restore bundled agent CLI resolution

- Upgrade EJClaw bundled Codex CLI to 0.124.0 for gpt-5.5 access
- Resolve Claude Agent SDK native binary packages via package.json
- Prefer glibc Claude binary before musl on Linux and align platform binary names
- Add regression coverage for optional package resolution

runners/codex-runner/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "ejclaw-runners-shared": "file:../shared",
-    "@openai/codex": "^0.120.0"
+    "@openai/codex": "^0.124.0"
   },
   "devDependencies": {
     "@types/node": "^22.10.7",