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_api.py

@@ -1,63 +1,4 @@
-"""
-OCR Pipeline API - Schrittweise Seitenrekonstruktion.
-
-Thin wrapper that assembles all sub-module routers into a single
-composite router.  Backward-compatible: main.py and tests can still
-import ``router``, ``_cache``, and helper functions from here.
-
-Sub-modules (each < 1 000 lines):
-  ocr_pipeline_common      – shared state, cache, Pydantic models, helpers
-  ocr_pipeline_sessions     – session CRUD, image serving, doc-type
-  ocr_pipeline_geometry     – deskew, dewarp, structure, columns
-  ocr_pipeline_rows         – row detection, box-overlay helper
-  ocr_pipeline_words        – word detection (SSE), paddle-direct, word GT
-  ocr_pipeline_ocr_merge    – paddle/tesseract merge helpers, kombi endpoints
-  ocr_pipeline_postprocess  – LLM review, reconstruction, export, validation
-  ocr_pipeline_auto         – auto-mode orchestrator, reprocess
-
-Lizenz: Apache 2.0
-DATENSCHUTZ: Alle Verarbeitung erfolgt lokal.
-"""
-
-from fastapi import APIRouter
-
-# ---------------------------------------------------------------------------
-# Shared state  (imported by main.py and orientation_crop_api.py)
-# ---------------------------------------------------------------------------
-from ocr_pipeline_common import (  # noqa: F401 – re-exported
-    _cache,
-    _BORDER_GHOST_CHARS,
-    _filter_border_ghost_words,
-)
-
-# ---------------------------------------------------------------------------
-# Sub-module routers
-# ---------------------------------------------------------------------------
-from ocr_pipeline_sessions import router as _sessions_router
-from ocr_pipeline_geometry import router as _geometry_router
-from ocr_pipeline_rows import router as _rows_router
-from ocr_pipeline_words import router as _words_router
-from ocr_pipeline_ocr_merge import (
-    router as _ocr_merge_router,
-    # Re-export for test backward compatibility
-    _split_paddle_multi_words,  # noqa: F401
-    _group_words_into_rows,     # noqa: F401
-    _merge_row_sequences,       # noqa: F401
-    _merge_paddle_tesseract,    # noqa: F401
-)
-from ocr_pipeline_postprocess import router as _postprocess_router
-from ocr_pipeline_auto import router as _auto_router
-from ocr_pipeline_regression import router as _regression_router
-
-# ---------------------------------------------------------------------------
-# Composite router (used by main.py)
-# ---------------------------------------------------------------------------
-router = APIRouter()
-router.include_router(_sessions_router)
-router.include_router(_geometry_router)
-router.include_router(_rows_router)
-router.include_router(_words_router)
-router.include_router(_ocr_merge_router)
-router.include_router(_postprocess_router)
-router.include_router(_auto_router)
-router.include_router(_regression_router)
+# Backward-compat shim -- module moved to ocr/pipeline/api.py
+import importlib as _importlib
+import sys as _sys
+_sys.modules[__name__] = _importlib.import_module("ocr.pipeline.api")