- Enhanced the Config struct to support JSON marshaling and unmarshaling with human-readable duration strings for various OAuth settings.
- Introduced temporary structures to facilitate the conversion of string duration fields to time.Duration types during JSON operations.
- Added utility functions for parsing and formatting duration strings, ensuring accurate handling of time-related configurations.
- Updated tests to validate the correct parsing and formatting of duration fields in the configuration.
- Introduced a new system store management feature, allowing for the loading of predefined system stores such as cache and OAuth client stores.
- Added a `loadSystemStores` function to handle the loading of system stores with variable replacement for configuration paths.
- Enhanced the `Load` function to include the loading of system stores, improving the overall store management process.
- Updated test utilities to support loading system stores for testing, ensuring comprehensive coverage and functionality.
- Refactored the `replaceVars` function to facilitate variable replacement in JSON strings, enhancing flexibility in store configurations.
