Try different relation method

Author: stephen-riggs

src/murfey/util/db.py

@@ -414,7 +414,7 @@ class DataCollectionGroup(SQLModel, table=True):  # type: ignore
     atlas_pixel_size: Optional[float] = None
     atlas: str = ""
     sample: Optional[int] = None
-    session: Optional[Session] = Relationship(back_populates="data_collection_groups")
+    session: Optional["Session"] = Relationship(back_populates="data_collection_groups")
     data_collections: List["DataCollection"] = Relationship(
         back_populates="data_collection_group",
         sa_relationship_kwargs={"cascade": "delete"},

src/murfey/util/processing_db.py

@@ -2,7 +2,6 @@
 from typing import List, Optional
 
 import sqlalchemy
-from pydantic import ConfigDict
 from sqlmodel import Enum, Field, Relationship, create_engine
 
 from murfey.util.db import (
@@ -27,8 +26,6 @@ class DataCollectionGroup(DataCollectionGroupOrig):
         sa_relationship_kwargs={"cascade": "delete"},
     )
 
-    model_config = ConfigDict(arbitrary_types_allowed=True)
-
 
 class DataCollection(DataCollectionOrig):
     MotionCorrection: List["MotionCorrection"] = Relationship(