Exclude test code from Codacy analysis #762

Goal\nExclude test projects and test source files from Codacy static analysis.\n\n## Requirements\n- Identify all test directories, projects, and supported test file patterns in the repository.\n- Add the narrowest appropriate Codacy exclusions for test code.\n- Keep production code analysis enabled.\n- Preserve test execution and coverage reporting where configured; this issue concerns static analysis exclusions only.\n- Verify the Codacy configuration is valid and test files are no longer reported by Codacy.