Separate test-specific environment variables from production config

[coderabbitai]

Background

As discussed in PR #9, the environment configuration in src/core/env.ts currently mixes test-specific environment variables with production configuration, which can lead to confusion and potential security issues.

Issue

Test-specific variables like USERNAME, EMAIL, PASSWORD, POSTMAN_COLLECTION, SKIP_DB_RESET, and DELAY_REQUEST are currently defined alongside production environment variables in the main environment configuration.

Suggestion

Consider creating a separate test environment configuration file or use environment-specific overrides to isolate test settings from production configuration.

References

• Original PR: Eden treaty tests #9
• Discussion: Eden treaty tests #9 (comment)
• Requested by: @yamcodes