klausur-service: 183 shims deleted, 26 test files + 8 source files updated
backend-lehrer: 59 shims deleted, main.py + 8 source files updated
All imports now use the new package paths directly.
Zero shims remaining in the entire codebase.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>