Two minor fixes: items is function and only add first processing params

Author: stephen-riggs

src/murfey/client/customlogging.py

@@ -23,7 +23,7 @@ def prepare(self, record):
         try:
             return json.dumps(record_dict)
         except TypeError:
-            return json.dumps({str(k): str(v) for k, v in record_dict.items})
+            return json.dumps({str(k): str(v) for k, v in record_dict.items()})
 
     def emit(self, record):
         try:

src/murfey/server/api/__init__.py

@@ -1725,7 +1725,7 @@ async def write_eer_fractionation_file(
     ).all()
     if session_parameters:
         session_parameters[0].eer_fractionation_file = str(file_path)
-        db.add(session_parameters)
+        db.add(session_parameters[0])
         db.commit()
 
     if file_path.is_file():