- docs/README.md: remove duplicate infrastructure/ entry at end of folder tree
- ocr-service/CLAUDE.md: add **LLM reminder:** prefix to ALLOWED_PDF_HOSTS
SSRF warning (consistent with all other machine-readable instructions)
- backend/CLAUDE.md: restore ResponseStatusException note for simple controller
validation — avoids LLMs reaching for DomainException for trivial checks
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ExcelService was deleted in fa60c5be. Both the root and backend
CLAUDE.md still listed it under importing/ and in the services table.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>