Restructure: Move ocr_pipeline + labeling + crop into ocr/ package

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

klausur-service/backend/ocr/pipeline/auto.py

@@ -0,0 +1,23 @@
+"""
+OCR Pipeline Auto-Mode Orchestrator and Reprocess Endpoints — Barrel Re-export.
+
+Split into submodules:
+- ocr_pipeline_reprocess.py    — POST /sessions/{id}/reprocess
+- ocr_pipeline_auto_steps.py   — POST /sessions/{id}/run-auto + VLM helper
+
+Lizenz: Apache 2.0
+DATENSCHUTZ: Alle Verarbeitung erfolgt lokal.
+"""
+
+from fastapi import APIRouter
+
+from .reprocess import router as _reprocess_router
+from .auto_steps import router as _steps_router
+
+# Combine both sub-routers into a single router for backwards compatibility.
+# The consumer imports `from ocr_pipeline_auto import router as _auto_router`.
+router = APIRouter(prefix="/api/v1/ocr-pipeline", tags=["ocr-pipeline"])
+router.include_router(_reprocess_router)
+router.include_router(_steps_router)
+
+__all__ = ["router"]