This pull request introduces a new component-level cache with time-to-live (TTL) support to improve performance when validating API tokens, and updates related tests and dependencies. The cache allows for background refreshing of component data and ensures that expired cache entries are refreshed asynchronously, reducing database load and improving response times. The changes also include dependency upgrades and new environment variable configuration.

Component cache implementation and usage:

• Added a component-level cache to the Cache class in src/helpers/cache/index.js, including methods for enabling, refreshing, and retrieving cached components with TTL enforcement and background refresh logic.
• Updated appAuth middleware in src/middleware/auth.js to leverage the new component cache for token validation, falling back to the database if needed, and refreshing the cache after validation.
• Added helper function isTokenValid to encapsulate token validation logic.

Configuration and environment:

• Introduced the CACHE_COMPONENT_MS environment variable in .env-cmdrc-template to control the TTL for component cache entries.

Testing improvements:

• Enhanced tests/client-api-cached.test.js to set up the component cache, seed it in test setup, and add comprehensive tests for cache expiry, background refresh, and token renewal scenarios.

Dependency upgrades:

• Upgraded sinon to version 22, along with related dependencies @sinonjs/fake-timers and diff in package.json and npm-shrinkwrap.json for improved testing support.
• Updated electron-to-chromium to the latest patch version in npm-shrinkwrap.json.