fix: show loading and unavailable states for operator balance and fee - #1876

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@6f8efc29b200d32929f49075959781ed54ec270c, actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5, actions/setup-node@3235b876344d2a9aa001b8d1453c930bba69e610, pnpm/action-setup@v2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/