bug: rules configuration is ignored in nested directories (e.g., in test/)

[solid-illiaaihistov]

File Structure

my_project/
  ├── analysis_options.yaml
  ├── lib/
  └── test/
       ├── analysis_options.yaml
       └── my_test.dart

analysis_options.yaml (Root)

analyzer:
  plugins:
    - solid_lints
solid_lints:
  diagnostics:
    avoid_late_keyword: true

test/analysis_options.yaml (Nested)

solid_lints:
  diagnostics:
    avoid_late_keyword: false

test/my_test.dart

void main() {
  late String myMock;
}

Expected behavior

No lint is triggered for test/my_test.dart because avoid_late_keyword is disabled in the nested test/analysis_options.yaml.

Actual behavior

The avoid_late_keyword lint rule is triggered for test/my_test.dart because the nested analysis_options.yaml is completely ignored, and the rules are evaluated using the root configuration.