test: update TestContainers integration tests and unit test fixtures to SQLAlchemy 2.0 select() API (#34969)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/tests/test_containers_integration_tests/core/app/layers/test_pause_state_persist_layer.py

@@ -557,11 +557,9 @@ class TestPauseStatePersistenceLayerTestContainers:
         self.session.refresh(self.test_workflow_run)
         assert self.test_workflow_run.status == WorkflowExecutionStatus.RUNNING
 
-        pause_states = (
-            self.session.query(WorkflowPauseModel)
-            .filter(WorkflowPauseModel.workflow_run_id == self.test_workflow_run_id)
-            .all()
-        )
+        pause_states = self.session.scalars(
+            select(WorkflowPauseModel).where(WorkflowPauseModel.workflow_run_id == self.test_workflow_run_id)
+        ).all()
         assert len(pause_states) == 0
 
     def test_layer_requires_initialization(self, db_session_with_containers):

api/tests/test_containers_integration_tests/models/test_types_enum_text.py

@@ -6,7 +6,7 @@ import pytest
 import sqlalchemy as sa
 from graphon.model_runtime.entities.model_entities import ModelType
 from sqlalchemy import exc as sa_exc
-from sqlalchemy import insert
+from sqlalchemy import insert, select
 from sqlalchemy.engine import Connection, Engine
 from sqlalchemy.orm import DeclarativeBase, Mapped, Session, mapped_column
 from sqlalchemy.sql.sqltypes import VARCHAR
@@ -137,12 +137,12 @@ class TestEnumText:
             session.commit()
 
         with Session(engine_with_containers) as session:
-            user = session.query(_User).where(_User.id == admin_user_id).first()
+            user = session.scalar(select(_User).where(_User.id == admin_user_id).limit(1))
             assert user.user_type == _UserType.admin
             assert user.user_type_nullable is None
 
         with Session(engine_with_containers) as session:
-            user = session.query(_User).where(_User.id == normal_user_id).first()
+            user = session.scalar(select(_User).where(_User.id == normal_user_id).limit(1))
             assert user.user_type == _UserType.normal
             assert user.user_type_nullable == _UserType.normal
 
@@ -206,7 +206,7 @@ class TestEnumText:
 
         with pytest.raises(ValueError) as exc:
             with Session(engine_with_containers) as session:
-                _user = session.query(_User).where(_User.id == 1).first()
+                _user = session.scalar(select(_User).where(_User.id == 1).limit(1))
 
         assert str(exc.value) == "'invalid' is not a valid _UserType"
 
@@ -222,7 +222,7 @@ class TestEnumText:
             session.commit()
 
         with Session(engine_with_containers) as session:
-            records = session.query(_LegacyModelTypeRecord).order_by(_LegacyModelTypeRecord.id).all()
+            records = session.scalars(select(_LegacyModelTypeRecord).order_by(_LegacyModelTypeRecord.id)).all()
 
         assert [record.model_type for record in records] == [
             ModelType.LLM,

api/tests/test_containers_integration_tests/test_workflow_pause_integration.py

@@ -26,7 +26,7 @@ from datetime import timedelta
 import pytest
 from graphon.entities import WorkflowExecution
 from graphon.enums import WorkflowExecutionStatus
-from sqlalchemy import delete, select
+from sqlalchemy import delete, func, select
 from sqlalchemy.orm import Session, selectinload, sessionmaker
 
 from extensions.ext_storage import storage
@@ -679,9 +679,12 @@ class TestWorkflowPauseIntegration:
 
         # Verify only 3 were deleted
         remaining_count = (
-            self.session.query(WorkflowPauseModel)
-            .filter(WorkflowPauseModel.id.in_([pe.id for pe in pause_entities]))
-            .count()
+            self.session.scalar(
+                select(func.count(WorkflowPauseModel.id)).where(
+                    WorkflowPauseModel.id.in_([pe.id for pe in pause_entities])
+                )
+            )
+            or 0
         )
         assert remaining_count == 2