Fix: Update all old-style imports inside packages to new paths

65 files in klausur-service packages + 3 in backend-lehrer packages
had stale imports referencing deleted shim modules.

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

klausur-service/backend/grid/editor/api_gutter.py

@@ -6,7 +6,7 @@ import logging
 
 from fastapi import APIRouter, HTTPException, Request
 
-from ocr_pipeline_session_store import (
+from ocr.pipeline.session_store import (
     get_session_db,
     update_session_db,
 )
@@ -35,7 +35,7 @@ async def gutter_repair(session_id: str):
             detail="No grid data. Run build-grid first.",
         )
 
-    from cv_gutter_repair import analyse_grid_for_gutter_repair
+    from ocr.gutter.repair import analyse_grid_for_gutter_repair
 
     image_width = grid_data.get("image_width", 0)
     result = analyse_grid_for_gutter_repair(grid_data, image_width=image_width)
@@ -86,7 +86,7 @@ async def gutter_repair_apply(session_id: str, request: Request):
     # Allows the user to pick a different correction from the alternatives list
     text_overrides = body.get("text_overrides", {})
 
-    from cv_gutter_repair import apply_gutter_suggestions
+    from ocr.gutter.repair import apply_gutter_suggestions
 
     suggestions = gutter_result.get("suggestions", [])