Cleanup: Delete ALL 242 shims, update ALL consumer imports

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>

klausur-service/backend/tests/test_rag_admin.py

@@ -56,7 +56,7 @@ class TestIngestionStatus:
 
     def test_status_not_running(self):
         """Test status when no ingestion is running."""
-        from admin_api import _ingestion_status
+        from admin.api import _ingestion_status
 
         # Reset status
         _ingestion_status["running"] = False
@@ -67,7 +67,7 @@ class TestIngestionStatus:
 
     def test_status_running(self):
         """Test status when ingestion is running."""
-        from admin_api import _ingestion_status
+        from admin.api import _ingestion_status
 
         _ingestion_status["running"] = True
         _ingestion_status["last_run"] = datetime.now().isoformat()
@@ -81,7 +81,7 @@ class TestUploadAPI:
 
     def test_upload_record_creation(self):
         """Test that upload records are created correctly."""
-        from admin_api import _upload_history
+        from admin.api import _upload_history
 
         # Clear history
         _upload_history.clear()
@@ -102,7 +102,7 @@ class TestUploadAPI:
 
     def test_upload_history_limit(self):
         """Test that upload history is limited to 100 entries."""
-        from admin_api import _upload_history
+        from admin.api import _upload_history
 
         _upload_history.clear()
 
@@ -187,7 +187,7 @@ class TestMetricsDB:
     @pytest.mark.asyncio
     async def test_store_feedback_no_pool(self):
         """Test feedback storage when DB is not available."""
-        from metrics_db import store_feedback
+        from metrics.db import store_feedback
 
         with patch('metrics_db.get_pool', new_callable=AsyncMock, return_value=None):
             result = await store_feedback(
@@ -199,7 +199,7 @@ class TestMetricsDB:
     @pytest.mark.asyncio
     async def test_calculate_metrics_no_pool(self):
         """Test metrics calculation when DB is not available."""
-        from metrics_db import calculate_metrics
+        from metrics.db import calculate_metrics
 
         with patch('metrics_db.get_pool', new_callable=AsyncMock, return_value=None):
             metrics = await calculate_metrics()
@@ -214,7 +214,7 @@ class TestMetricsDB:
         ]
 
         # Read the metrics_db module to check table names
-        from metrics_db import init_metrics_tables
+        from metrics.db import init_metrics_tables
 
         # The function should create these tables
         assert callable(init_metrics_tables)
@@ -231,8 +231,8 @@ class TestRAGIntegration:
     @pytest.mark.asyncio
     async def test_nibis_search(self):
         """Test NiBiS semantic search."""
-        from admin_api import search_nibis
-        from admin_api import NiBiSSearchRequest
+        from admin.api import search_nibis
+        from admin.api import NiBiSSearchRequest
 
         request = NiBiSSearchRequest(
             query="Gedichtanalyse Expressionismus",
@@ -265,7 +265,7 @@ class TestRAGIntegration:
     @pytest.mark.asyncio
     async def test_metrics_storage(self):
         """Test metrics storage in PostgreSQL."""
-        from metrics_db import store_feedback, calculate_metrics
+        from metrics.db import store_feedback, calculate_metrics
 
         # This would require PostgreSQL running
         # stored = await store_feedback(
@@ -330,7 +330,7 @@ class TestEmbeddings:
 
     def test_vector_dimensions(self):
         """Test that vector dimensions are configured correctly."""
-        from eh_pipeline import get_vector_size, EMBEDDING_BACKEND
+        from korrektur.eh_pipeline import get_vector_size, EMBEDDING_BACKEND
 
         size = get_vector_size()
 
@@ -341,7 +341,7 @@ class TestEmbeddings:
 
     def test_chunking_config(self):
         """Test chunking configuration."""
-        from eh_pipeline import CHUNK_SIZE, CHUNK_OVERLAP
+        from korrektur.eh_pipeline import CHUNK_SIZE, CHUNK_OVERLAP
 
         assert CHUNK_SIZE > 0
         assert CHUNK_OVERLAP >= 0