- Added unit tests for schema loader, mocking Config variables and resolvers.
- Added unit tests for Zabbix API configuration, verifying constants derived from Config.
- Mocked relevant modules and filesystem behaviors to enable isolated testing.
- Optimized imports on all files and include this within a new .junie/guidelines.md file
- Introduced `HOST_TYPE_FILTER_DEFAULT` and `HOST_GROUP_FILTER_DEFAULT` constants in the `Config` class.
- Updated resolvers to use these defaults when `tag_hostType` or `search_name` arguments are not provided.
- Added corresponding tests to verify default behavior in host and host group queries.
- Added documentation on overriding 'HOST_GROUP_FILTER_DEFAULT' by explicitly setting the 'search_name' argument in the 'allHostGroups' query.
- Explained the usage of the '*' wildcard in 'search_name' with a concrete example for subgroup matching.
- Replaced all direct `process.env` references with `Config` class constants.
- Added `dotenv` package to manage environment variables.
- Updated affected files, including schema loader, Zabbix API, resolvers, logging system, and integration points.
- Improved maintainability and consistency in environment variable handling.
