fix: resolve session management issues in tests and WebSocket endpoints

- Add missing db_session parameter to test_pipeline_main_file.py tests
- Fix WebSocket endpoint missing session dependency injection
- Update test fixtures to pass session as first argument to pipeline.process()
- Add required imports (Depends, AsyncSession, get_session) to transcripts_websocket.py

Note: 2 WebRTC tests still failing due to known asyncio event loop issues with SQLAlchemy

server/tests/test_pipeline_main_file.py

@@ -297,6 +297,7 @@ async def mock_summary_processor():
 
 @pytest.mark.asyncio
 async def test_pipeline_main_file_process(
+    db_session,
     tmpdir,
     mock_transcript_in_db,
     dummy_file_transcript,
@@ -377,7 +378,7 @@ async def test_pipeline_main_file_process(
         mock_av.side_effect = [mock_container, mock_decode_container]
 
         # Run the pipeline
-        await pipeline.process(upload_path)
+        await pipeline.process(db_session, upload_path)
 
     # Verify audio extraction and writing
     assert mock_audio_file_writer.push.called
@@ -422,6 +423,7 @@ async def test_pipeline_main_file_process(
 
 @pytest.mark.asyncio
 async def test_pipeline_main_file_with_video(
+    db_session,
     tmpdir,
     mock_transcript_in_db,
     dummy_file_transcript,
@@ -468,7 +470,7 @@ async def test_pipeline_main_file_with_video(
         mock_av.side_effect = [mock_container, mock_decode_container]
 
         # Run the pipeline
-        await pipeline.process(upload_path)
+        await pipeline.process(db_session, upload_path)
 
     # Verify audio extraction from video
     assert mock_audio_file_writer.push.called
@@ -486,6 +488,7 @@ async def test_pipeline_main_file_with_video(
 
 @pytest.mark.asyncio
 async def test_pipeline_main_file_no_diarization(
+    db_session,
     tmpdir,
     mock_transcript_in_db,
     dummy_file_transcript,
@@ -533,7 +536,7 @@ async def test_pipeline_main_file_no_diarization(
             mock_av.side_effect = [mock_container, mock_decode_container]
 
             # Run the pipeline
-            await pipeline.process(upload_path)
+            await pipeline.process(db_session, upload_path)
 
         # Verify the pipeline completed without diarization
         assert mock_storage._put_file.called
@@ -547,6 +550,7 @@ async def test_pipeline_main_file_no_diarization(
 
 @pytest.mark.asyncio
 async def test_task_pipeline_file_process(
+    db_session,
     tmpdir,
     mock_transcript_in_db,
     dummy_file_transcript,
@@ -593,7 +597,7 @@ async def test_task_pipeline_file_process(
         from reflector.pipelines.main_file_pipeline import PipelineMainFile
 
         pipeline = PipelineMainFile(transcript_id=mock_transcript_in_db.id)
-        await pipeline.process(upload_path)
+        await pipeline.process(db_session, upload_path)
 
     # Verify the pipeline was executed through the task
     assert mock_audio_file_writer.push.called
@@ -633,6 +637,7 @@ async def test_pipeline_file_process_no_transcript():
 
 @pytest.mark.asyncio
 async def test_pipeline_file_process_no_audio_file(
+    db_session,
     mock_transcript_in_db,
 ):
     """
@@ -650,4 +655,4 @@ async def test_pipeline_file_process_no_audio_file(
 
     # This should fail when trying to open the file with av
     with pytest.raises(Exception):
-        await pipeline.process(non_existent_path)
+        await pipeline.process(db_session, non_existent_path)