Harden backend auth: scoped rate limiting, trusted proxies, and API key scopes/expiry - #998

Process completed with exit code 2.

cannot find type `ContractError` in this scope

cannot find type `ContractError` in this scope

cannot find type `ContractError` in this scope

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684, actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/