Update comprehensive test coverage:
- E2E tests with scheduler integration
- Integration tests with tenant isolation
- Unit tests with security assertions
- Security tests with audit validation
- Audit verification tests
- Auth tests with tenant scoping
- Config validation tests
- Container security tests
- Worker tests with scheduler mock
- Environment pool tests
- Load tests with distributed patterns
- Test fixtures with scheduler support
- Update go.mod/go.sum with new dependencies
Bug fixes and cleanup for test infrastructure:
- schema_test.go: Fix SchemaVersion reference with proper manifest import
- schema_test.go: Update all schema.json paths to internal/manifest location
- manifestenv.go: Remove unused helper functions (isArtifactsType, getPackagePath)
- nobaredetector.go: Fix exprToString syntax error, remove unused functions
All tests now pass without errors or warnings
